Document:

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                                                                   EXHIBIT 4.18

                                                              WARRANT NO. A - _

             ELECTRONICS ACCESSORY SPECIALISTS INTERNATIONAL, INC.
                           d/b/a MOBILITY ELECTRONICS
                            (A DELAWARE CORPORATION)

                          FORM OF WARRANT TO PURCHASE
                             SHARES OF COMMON STOCK

NEITHER THIS WARRANT NOR THE SHARES ISSUABLE UPON ITS EXERCISE HAVE BEEN
REGISTERED UNDER EITHER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD, OFFERED FOR
SALE, TRANSFERRED, ASSIGNED, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN
EFFECTIVE REGISTRATION STATEMENT WITH RESPECT TO THE SECURITIES UNDER THE
SECURITIES ACT AND ANY APPLICABLE STATE SECURITIES LAWS OR AN OPINION OF
COUNSEL SATISFACTORY TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

         THIS CERTIFIES THAT, for value received, _________________ or
registered assigns (hereinafter, the "Holder"), is entitled to purchase,
subject to the conditions set forth below, at any time or from time to time
during the Exercise Period (as defined in subsection 1.2, below),
_____________________________________ (______) shares ("Shares") of fully paid
and non- assessable common stock, par value $0.01 per share ("Common Stock"),
of ELECTRONICS ACCESSORY SPECIALISTS INTERNATIONAL, INC., a Delaware
corporation (the "Company"), at the per share purchase price (the "Warrant
Price") set forth in subsection 1.1, subject to the further provisions of this
Warrant. The term "Warrants" as used herein shall mean this Warrant and all
instruments issued by the Company which are substantially identical to this
Warrant (except for the name of the Holder and the number of securities
purchasable by the Holder).

1.       EXERCISE OF WARRANT

         The terms and conditions upon which this Warrant may be exercised, and
the Common Stock covered hereby may be purchased, are as follows:

         1.1      Warrant Price. The Warrant Price shall be Five Dollars and
75/100 ($5.75) per Share, subject to adjustment as provided in Section 4 below.

         1.2      Method Of Exercise. The Holder of this Warrant may, at any
time prior to April 20, 2003 exercise in whole or in part the purchase rights
evidenced by this Warrant. Such exercise shall be effected by:

                           (a)      the surrender of the Warrant, together with
                  a duly executed copy of the form of subscription attached
                  hereto, to the Secretary of the Company at its principal
                  offices;

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                           (b)      the payment to the Company, by certified
                  check or bank draft payable to its order, of an amount equal
                  to the aggregate Warrant Price for the number of Shares for
                  which the purchase rights hereunder are being exercised; and

                           (c)      the delivery to the Company, if necessary
                  to assure compliance with federal and state securities laws,
                  of an instrument executed by the Holder certifying that the
                  Shares are being acquired for the sole account of the Holder
                  and not with a view to any resale or distribution.

         As used herein "Sales Transaction" means: (i) the consolidation or
merger of the Company with or into any other corporation or business entity
(other than a consolidation or merger effected to change the state of
incorporation of the Company or effected with a principal purpose of causing
the exercise of the Warrants or the termination of the Exercise Period), (ii)
the sale or other transfer in a single transaction or a series of related
transactions of all or substantially all of the assets of the Company, or (iii)
the liquidation, dissolution, winding-up or reorganization of the Company.

         Notwithstanding the foregoing provisions requiring payment by check,
the Holder may from time to time at the Holder's option pay such Purchase Price
or any portion thereof by surrendering to the Company in lieu of such payment,
the right of such Holder to receive a number of shares of Common Stock having
an aggregate Market Value (as herein defined) equal to such Purchase Price (or
portion thereof) on the date of exercise (a "Cashless Exercise"). For purposes
of the foregoing, the term "Market Value" of a share of Common Stock as of a
relevant date means the closing price on the trading day preceding such date
with respect to the Common Stock on a national securities exchange, the Nasdaq
National Market or the Nasdaq Small-Cap Market. The closing price shall be (i)
the last sale price of shares of the Common Stock on such trading day or, if no
such sale takes place on such date, the average of the closing bid and asked
prices thereof on such date, in each case as officially reported on the
principal national securities exchange, the Nasdaq National Market or the
Nasdaq Small-Cap Market on which the Common Stock is then listed or admitted to
trading; or (ii) if no shares of Common Stock are then listed or admitted to
trading on any national securities exchange, the Nasdaq National Market or the
Nasdaq Small-Cap Market, the average of the reported closing bid and asked
prices thereof on such date in the over-the-counter market as shown on the
National Association of Securities Dealers automated quotation system. The
foregoing option of the Holder shall be of no force or effect unless the Common
Stock is then listed, admitted to trading, or reported.

         1.3      Satisfaction with Requirements of Securities Act of 1933.
Notwithstanding the provisions of subsection 1.2(c) and Section 7, each and
every exercise of this Warrant is contingent upon the Company's satisfaction
that the issuance of Common Stock upon the exercise is exempt from the
requirements of the Securities Act of 1933, as amended (the "Securities Act")
and all applicable state securities laws. The Holder of this Warrant agrees to
execute any and all documents determined necessary by the Company's counsel to
effect the exercise of this Warrant.

         1.4      Issuance Of Shares and New Warrant. In the event the purchase
rights evidenced by this Warrant are exercised in whole or in part, one or more
certificates for the purchased Shares shall be issued as soon as practicable
thereafter to the person exercising such rights. Such Holder shall

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also be issued at such time a new Warrant representing the number of Shares (if
any) for which the purchase rights under this Warrant remain unexercised and
continuing in force and effect.

2.       TRANSFERS

         2.1      Transfers. Subject to Sections 1.2 and 7 hereof, this Warrant
and all rights hereunder are transferable in whole or in part by the Holder.
The transfer shall be recorded on the books of the Company upon the surrender
of this Warrant, properly endorsed, to the Secretary of the Company at its
principal offices and the payment to the Company of all transfer taxes and
other governmental charges imposed on such transfer. In the event of a partial
transfer, the Company shall issue to the several Holders one or more
appropriate new Warrants.

         2.2      Registered Holder. Each Holder agrees that until such time as
any transfer pursuant to subsection 2.1 is recorded on the books of the
Company, the Company may treat the registered Holder of this Warrant as the
absolute owner; provided that nothing herein affects any requirement that
transfer of any Warrant or share of Common Stock issued or issuable upon the
exercise thereof by subject to securities law compliance.

         2.3      Form Of New Warrants. All Warrants issued in connection with
transfers of this Warrant shall bear the same date as this Warrant and shall be
substantially identical in form and provision to this Warrant, with the
possible exception of the number of Shares purchasable thereunder.

3.       FRACTIONAL SHARES

         Notwithstanding that the number of Shares purchasable upon the
exercise of this Warrant may have been adjusted pursuant to the terms hereof,
the Company shall nonetheless not be required to issue fractions of Shares upon
exercise of this Warrant or to distribute certificates that evidence fractional
shares nor shall the Company be required to make any cash payments in lieu
thereof upon exercise of this Warrant. Holder hereby waives any right to
receive fractional Shares. If a fractional Share shall result from adjustments
in the number of Shares purchasable hereunder, the number of Shares purchasable
hereunder shall, on an aggregate basis taking into account all adjustments
hereunder from the date of issuance of this Warrant, be rounded up to the next
whole number.

4.       ANTIDILUTION PROVISIONS

         The provisions of this Section 4 shall apply in the event that any of
the events described in this Section 4 shall occur with respect to the Common
Stock of the Company at any time on or after the original issuance date of this
Warrant.

         4.1      Stock Splits And Combinations. If the Company shall at any
time subdivide or combine its outstanding shares of Common Stock, this Warrant
shall, after that subdivision or combination, evidence the right to purchase
the number of shares of Common Stock that would have been issuable as a result
of that change with respect to the Shares which were purchasable under this
Warrant immediately before that subdivision or combination. If the Company
shall at any time

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subdivide the outstanding shares of Common Stock, the Warrant Price then in
effect immediately before that subdivision shall be proportionately decreased,
and, if the Company shall at any time combine the outstanding shares of Common
Stock, the Warrant Price then in effect immediately before that combination
shall be proportionately increased. Any adjustment under this Section shall
become effective at the time that such subdivision or combination becomes
effective.

         4.2      Reclassification, Exchange and Substitution. If the Common
Stock issuable upon exercise of this Warrant shall be changed into the same or
a different number of shares of any other class or classes of stock, whether by
capital reorganization, reclassification, or otherwise (other than a
subdivision or combination of shares provided for above), the Holder of this
Warrant shall, on its exercise, be entitled to purchase for the same aggregate
consideration, in lieu of the Common Stock which the Holder would have become
entitled to purchase but for such change, the number of shares of such other
class or classes of stock equivalent to the number of shares of Common Stock
that would have been subject to purchase by the Holder on exercise of this
Warrant immediately before that change.

         4.3      Reorganizations, Mergers, Consolidations Or Sale Of Assets.
If at any time there shall be a capital reorganization of the Common Stock
(other than a combination, reclassification, exchange, or subdivision of shares
provided for elsewhere above) then, as a part of such reorganization, lawful
provision shall be made so that the Holder of this Warrant shall thereafter be
entitled to receive upon exercise of this Warrant, during the period specified
in this Warrant and upon payment of the Warrant Price then in effect, the
number of shares of Common Stock or other securities or property of the
Company, to which a holder of the Common Stock deliverable upon exercise of
this Warrant would have been entitled in such capital reorganization, if this
Warrant had been exercised immediately before that capital reorganization. In
any such case, appropriate adjustment (as determined in good faith by the
Company's Board of Directors) shall be made in the application of the
provisions of this Warrant with respect to the rights and interests of the
Holder of this Warrant after the reorganization to the end that the provisions
of this Warrant (including adjustment of the Warrant Price then in effect and
number of Shares purchasable upon exercise of this Warrant) shall be applicable
after that event, as near as reasonably may be, in relation to any shares or
other property deliverable after that event upon exercise of this Warrant. The
Company shall, within thirty (30) days after making such adjustment, give
written notice (by first class mail, postage prepaid) to the registered Holder
of this Warrant at the address of that Holder shown on the Company's books.
That notice shall set forth, in reasonable detail, the event requiring the
adjustment and the method by which the adjustment was calculated and specify
the Warrant Price then in effect after the adjustment and the increased or
decreased number of Shares purchasable upon exercise of this Warrant. When
appropriate, that notice may be given in advance and include as part of the
notice required under other provisions of this Warrant.

         4.4      Common Stock Dividends; Distributions. In the event the
Company should at any time prior to the expiration of this Warrant fix a record
date for the determination of the holders of Common Stock entitled to receive a
dividend or other distribution payable in additional shares of Common Stock or
other securities or rights convertible into or entitling the holder thereof to
receive, directly or indirectly, additional shares of Common Stock (hereinafter
referred to as the "Common Stock Equivalents") without payment of any
consideration by such holder for the additional shares

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of Common Stock or Common Stock Equivalents (including the additional shares of
Common Stock issuable upon conversion or exercise thereof), then, as of such
record date (or the date of such distribution, split or subdivision if no
record date is fixed), the Warrant Price shall be appropriately decreased and
the number of shares of Common Stock issuable upon exercise of the Warrant
shall be appropriately increased in proportion to such increase of outstanding
shares.

         4.5      Adjustments of Other Distributions. In the event the Company
shall declare a distribution payable in securities of other persons, evidences
of indebtedness issued by the Company or other persons, assets (excluding cash
dividends) or options or rights not referred to in subsection 4.4, then, in
each such case for the purpose of this subsection 4.5, upon exercise of this
Warrant the Holder hereof shall be entitled to a proportionate share of any
such distribution as though such Holder was the holder of the number of shares
of Common Stock into which this Warrant may be exercised as of the record date
fixed for the determination of the holders of Common Stock of the Company
entitled to receive such distribution.

         4.6      Certificate as to Adjustments. In the case of each adjustment
or readjustment of the Warrant Price pursuant to this Section 4, the Company
will promptly compute such adjustment or readjustment in accordance with the
terms hereof and cause a certificate setting forth such adjustment or
readjustment and showing in detail the facts upon which such adjustment or
readjustment is based, to be delivered to the Holder of this Warrant. The
Company will, upon the written request at any time of the Holder of this
Warrant, furnish or cause to be furnished to such Holder a certificate setting
forth:

                           (a)      Such adjustments and readjustments;

                           (b)      The purchase price at the time in effect;
                                    and

                           (c)      The number of shares of Common Stock
                                    issuable upon exercise of the Warrant and
                                    the amount, if any, of other property at
                                    the time receivable upon the exercise of
                                    the Warrant.

         4.7      Reservation of Stock Issuable Upon Exercise. The Company
shall at all times reserve and keep available out of its authorized but
unissued shares of Common Stock solely for the purpose of effecting the
exercise of this Warrant such number of its shares of Common Stock as shall
from time to time be sufficient to effect the exercise of this Warrant and if
at any time the number of authorized but unissued shares of Common Stock shall
not be sufficient to effect the exercise of this Warrant, in addition to such
other remedies as shall be available to the Holder of this Warrant, the Company
will use its best efforts to take such corporate action as may, in the opinion
of its counsel, be necessary to increase its authorized but unissued shares of
Common Stock to such number of shares as shall be sufficient for such purposes.

5.       RIGHTS PRIOR TO EXERCISE OF WARRANT

         This Warrant does not entitle the Holder to any of the rights of a
stockholder of the Company, including without limitation, the right to receive
dividends of other distributions, to

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exercise any preemptive rights, to vote, or to consent or to receive notice as
a stockholder of the Company. If, however, at any time prior to the expiration
of this Warrant and prior to its exercise, any of the following events shall
occur:

                           (a)      the Company shall declare any dividend
                  payable in any securities upon its shares of Common Stock or
                  make any distribution (other than a cash dividend) to the
                  holders of its shares of Common Stock;

                           (b)      the Company shall offer to all of the
                  holders of its shares of Common Stock any additional shares
                  of Common Stock or securities convertible into or
                  exchangeable for shares of Common Stock or any right to
                  subscribe for or purchase any thereof; or

                           (c)      a dissolution, liquidation or winding up of
                  the Company (other than in connection with a consolidation,
                  merger, sale, transfer or lease of all or substantially all
                  of its property, assets, and business as an entirety) shall
                  be proposed and action by the Company with respect thereto
                  has been approved by the Company's Board of Directors,

the Company shall give notice in writing of such event to the Holder at his
last address as it shall appear on the Company's records at least twenty days
prior to the date fixed as a record date or the date of closing the transfer
books for the determination of the stockholders entitled to such dividends,
distribution, or subscription rights, or for the determination of stockholders
entitled to vote on such proposed dissolution, liquidation or winding up. Such
notice shall specify such record date or the date of closing the transfer
books, as the case may be. Failure to publish, mail or receive such notice or
any defect therein or in the publication or mailing thereof shall not affect
the validity of any action taken in connection with such dividend, distribution
or subscription rights, or such proposed dissolution, liquidation or winding
up. Each person in whose name any certificate for Shares is to be issued shall
for all purposes be deemed to have become the holder of record of such Shares
on the date on which this instrument was surrendered and payment of the Warrant
Price was made, irrespective of the date of delivery of such stock certificate,
except that, if the date of such surrender and payment is a date when the stock
transfer books of the Company are closed, such person shall be deemed to have
become the holder of such Shares at the close of business on the next
succeeding date on which the stock transfer books are open.

6.       SUCCESSORS AND ASSIGNS

         The terms and provisions of this Warrant shall inure to the benefit
of, and be binding upon, the Company and the holder thereof and their
respective successors and permitted assigns.

7.       RESTRICTED SECURITIES

         In order to enable the Company to comply with the Securities Act and
applicable state laws, the Company may require the Holder as a condition of the
transfer or exercise of this Warrant, to give written assurance satisfactory to
the Company that the Warrant, or in the case of an exercise

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hereof the Shares subject to this Warrant, are being acquired for his or her
own account, for investment only, with no view to the distribution of the same,
and that any disposition of all or any portion of this Warrant or the Shares
issuable upon the due exercise of this Warrant shall not be made, unless and
until:

                           (a)      There is then in effect a registration
                  statement under the Securities Act covering such proposed
                  disposition and such disposition is made in accordance with
                  such registration statement; or

                           (b)      (i) The Holder has notified the Company of
                  the proposed disposition and shall have furnished the Company
                  with a detailed statement of the circumstances surrounding
                  the proposed disposition, and (ii) the Holder has furnished
                  the Company with an opinion of counsel, reasonably
                  satisfactory to the Company, that such disposition will not
                  require registration of such securities under the Securities
                  Act and applicable state law.

         Any transferee of this Warrant, by its acceptance thereof, agrees to
be bound by the terms of this Warrant with the same force and effect as if a
signatory thereto.

         The Holder acknowledges that this Warrant is, and each of the shares
of Common Stock issuable upon the due exercise hereof will be, a restricted
security, that he understands the provisions of Rule 144 of the Securities and
Exchange Commission, and that the certificate or certificates evidencing such
shares of Common Stock will bear a legend substantially similar to the
following:

         "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR UNDER THE SECURITIES
         LAWS OF ANY STATE, AND MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED,
         ASSIGNED, PLEDGED, HYPOTHECATED, OR OTHERWISE DISPOSED OF IN THE
         ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT COVERING THESE
         SECURITIES UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES
         LAWS, OR AN OPINION OF COUNSEL SATISFACTORY TO THE COMPANY THAT
         REGISTRATION IS NOT REQUIRED THEREUNDER."

8.       LOSS OR MUTILATION

         Upon receipt by the Company of satisfactory evidence of the ownership
of and the loss, theft, destruction, or mutilation of any Warrant, and (i) in
the case of loss, theft, or destruction, upon receipt by the Company of
indemnity satisfactory to it, or (ii) in the case of mutilation, upon receipt
of such Warrant and upon surrender and cancellation of such Warrant, the
Company shall execute and deliver in lieu thereof a new Warrant representing
the right to purchase an equal number of shares of Common Stock.

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9.       NOTICES

         All notices, requests, demands and other communications under this
Warrant shall be in writing and shall be deemed to have been duly given on the
date of service if served personally on the party to whom notice is to be
given, or on the date of mailing if mailed to the party to whom notice is to be
given, by first class mail, registered or certified, postage prepaid, and
properly addressed as follows: if to the Holder, at his address as shown in the
Company records; and if to the Company, at its principal office. Any party may
change its address for purposes of this Section by giving the other party
written notice of the new address in the manner set forth above.

10.      GOVERNING LAW

         This Warrant and any dispute, disagreement or issue of construction of
interpretation arising hereunder whether relating to its execution, its
validity, the obligations provided herein or performance shall be governed or
interpreted according to the internal laws of the State of Delaware without
regard to conflicts of law.

         DATED:   April 20, 1998

                                        ELECTRONICS ACCESSORY
                                        SPECIALISTS INTERNATIONAL, INC.

                                        /s/ Charles R.  Mollo
                                        ----------------------------------------
                                        Charles R. Mollo, President

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                                  SUBSCRIPTION

ELECTRONICS ACCESSORY SPECIALISTS
INTERNATIONAL, INC.
Attn: President
7955 East Redfield Road
Scottsdale, Arizona 85260

Ladies and Gentlemen:

The undersigned,_______________________, hereby elects to purchase, pursuant to
the provisions of the foregoing Warrant held by the undersigned, _____shares
(the "Shares") of the Common Stock, par value $0.01 per share ("Common Stock"),
of Electronics Accessory Specialists International, Inc, a Delaware
corporation.

Payment of the purchase price for the Shares required under such Warrant
accompanies this subscription.

The undersigned hereby represents and warrants that the undersigned is
acquiring the Shares for the account of the undersigned and not for resale or
with a view to distribution of such Shares or any part hereof; that the
undersigned is fully aware of the transfer restrictions affecting restricted
securities under the pertinent securities laws and the undersigned understands
that the Shares purchased hereby are restricted securities and that the
certificate or certificates evidencing the same will bear a legend to that
effect.

DATED:                 .
       ----------------

                                  Signature:
                                            ------------------------------------
                                  Printed:
                                            ------------------------------------
                                  Address:
                                            ------------------------------------<PAGE>   1
                                                                    EXHIBIT 10.1

                         INDUSTRIAL MODIFIED GROSS LEASE

                              MONAGHAN COMPANY, LLC

                                       and

                             COLONIAL TRUST COMPANY,
                              AS SUCCESSOR TRUSTEE
                 UNDER THE MONAGHAN IRREVOCABLE CHILDREN'S TRUST
                            CREATED DECEMBER 17, 1983

                                    Landlord

                                       and

              ELECTRONICS ACCESSORY SPECIALISTS INTERNATIONAL, INC.

                                     Tenant

                                 Dated: 12-20-96

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                               TABLE OF CONTENTS

<TABLE>
<S>        <C>                                                               <C>
ARTICLE 1  SUMMARY OF BASIC TERMS.............................................1

ARTICLE 2  DELIVERY, TERM AND CONSTRUCTION....................................2
     2.1   Term...............................................................2
     2.2   Memorandum.........................................................2
     2.3   Area Measurement...................................................2
     2.4   Condition..........................................................2
     2.5   Expansion Option...................................................2

ARTICLE 3  USE OF PREMISES....................................................3
     3.1   Permitted Uses.....................................................3
     3.2   Insurance Restrictions.............................................3
     3.3   Improvements.......................................................3
     3.4   Prohibitions.......................................................3
     3.5   Common Areas.......................................................3
     3.6   Rules and Regulations..............................................3
     3.7   Compliance with Law................................................3
     3.8   Audit..............................................................4

ARTICLE 4  SECURITY DEPOSIT...................................................4

ARTICLE 5  RENT...............................................................4
     5.1   Base Rent..........................................................4
     5.2   Adjustments........................................................4
     5.3   Late Charges and Interest..........................................5
     5.4   Excise Taxes.......................................................5
     5.5   Obligations Are Rent...............................................5
     5.6   Proration..........................................................5

ARTICLE 6  OPERATING COSTS....................................................5
     6.1   Tenant's Share.....................................................5
     6.2   Estimates..........................................................5
     6.3   Annual Reconciliation..............................................5
     6.4   Partial Year Proration; Variable Cost Adjustment...................5
     6.5   "Operating Costs"..................................................6
     6.6   Exclusions.........................................................7
     6.7   Excess Expenses....................................................7

ARTICLE 7  TAXES..............................................................7

ARTICLE 8  INSURANCE AND INDEMNITY............................................8
     8.1   Insurance Policies.................................................8
     8.2   Policy Requirements................................................8
     8.3   Evidence of Coverage...............................................8
     8.4   Indemnity and Exculpation..........................................8
     8.5   Landlord's Policies................................................9

ARTICLE 9  FIRE AND CASUALTY..................................................9
     9.1   Termination Rights.................................................9
     9.2   Restoration........................................................9
     9.3   Abatement..........................................................9
     9.4   Demolition of Project..............................................9
     9.5   Agreed Remedies....................................................9

ARTICLE 10 CONDEMNATION.......................................................9
     10.1  Automatic Termination..............................................9
     10.2  Optional Termination..............................................10
     10.3  Award.............................................................10

ARTICLE 11 MAINTENANCE.......................................................10
     11.1  By Tenant.........................................................10
     11.2  By Landlord.......................................................10
     11.3  Cost Reimbursement................................................10
</TABLE>

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<TABLE>
<S>         <C>                                                             <C>
ARTICLE 12  UTILITIES........................................................10

ARTICLE 13  LANDLORD RIGHT OF ENTRY..........................................10

ARTICLE 14  SIGNS............................................................11

ARTICLE 15  TENANT ALTERATIONS...............................................11
     15.1   Tenant Alterations...............................................11
     15.2   Tenant Installations.............................................11
     15.3   Mechanics Liens..................................................11

ARTICLE 16  ASSIGNMENT AND SUBLETTING........................................12
     16.1   Consent Required.................................................12
     16.2   Requests for Approval............................................12
     16.3   Continued Responsibility.........................................12
     16.4   Excess Proceeds..................................................12
     16.5   Limitations......................................................12
     16.6   No Waiver........................................................12
     16.7   Transfer by Landlord.............................................12

ARTICLE 17  SUBORDINATION AND ATTORNMENT.....................................12
     17.1   Subordination....................................................12
     17.2   Lender Protection................................................13
     17.3   Documentation....................................................13
     17.4   Other Transactions...............................................13

ARTICLE 18  ESTOPPEL CERTIFICATES............................................13

ARTICLE 19  QUIET ENJOYMENT..................................................13

ARTICLE 20  SURRENDER AND HOLDOVER...........................................13
     20.1   Surrender........................................................13
     20.2   Holdover.........................................................14

ARTICLE 21  BREACH, DEFAULT, AND REMEDIES....................................14
     21.1   Default..........................................................14
     21.2   Remedies.........................................................14
     21.3   Subtenancies.....................................................15

ARTICLE 22  LANDLORD LIABILITY...............................................15

ARTICLE 23  NOTICES..........................................................15

ARTICLE 24  BROKERAGE........................................................15

ARTICLE 25  GENERAL..........................................................16
     25.1   Severability.....................................................16
     25.2   No Waiver........................................................16
     25.3   Effect of Payment................................................16
     25.4   Delay............................................................16
     25.5   Lender Notice....................................................16
     25.6   No Offer.........................................................16
     25.7   Successors.......................................................16
     25.8   Integration......................................................16
     25.9   Governing Law....................................................16
     25.10  Deadlines Enforceable............................................16
     25.11  Counterparts.....................................................16

ARTICLE 26  OPTION TO EXPAND.................................................17

ARTICLE 27  RIGHT OF FIRST REFUSAL...........................................17

ARTICLE 28  REPRESENTATIONS AND WARRANTIES...................................17

EXHIBIT A - THE PREMISES.....................................................20

EXHIBIT B - THE PROJECT......................................................21

EXHIBIT C - CONSTRUCTION PROVISIONS..........................................22

EXHIBIT D - RULES AND REGULATIONS............................................23
</TABLE>

<PAGE>   4

                                                         Dated December 20, 1996

                         INDUSTRIAL MODIFIED GROSS LEASE

MONAGHAN COMPANY, LLC an Arizona limited liability company, and COLONIAL TRUST
COMPANY, an Arizona corporation, as successor Trustee under the Monaghan,
Irrevocable Children's Trust created December 17, 1983 (collectively,
"Landlord"), hereby leases the Premises described below, for the Term and on the
terms and conditions set forth in this Lease, to ELECTRONICS ACCESSORY
SPECIALISTS INTERNATIONAL, INC., a Delaware corporation ("Tenant").

ARTICLE 1   SUMMARY OF BASIC TERMS

1.1      The Premises: Unit A in the Building consisting of approximately 38,712
         square feet of rentable area as illustrated on the attached Exhibit A.

1.2      The Building: The building located at 7955 East Redfield Road,
         Scottsdale, Arizona.

1.3      "Project" means the Building identified in Section 1.2, and all lands
         and facilities used in connection with the Building as reasonably
         determined from time to time by Landlord. A site plan for the Project
         in its current configuration is attached as Exhibit B.

1.4      Security Deposit: $29,398.00

1.5      The Term: TWENTY FIVE (25) MONTHS, beginning on the Commencement Date
         and ending on the Expiration Date, (the "Initial Term") subject to the
         provisions of Section 2.5.

1.6      Commencement and Expiration Dates: JANUARY 1, 1997 AND JANUARY 31,
         1999, respectively, subject to the provisions of Section 2.1 and
         Exhibit C.

1.7      Base Rent: $.75 per rentable square foot per month from the
         Commencement Date through JANUARY 31, 1999, subject to adjustment under
         the provisions of Section 5.2. THE FIRST THIRTY (30) DAYS OF RENT SHALL
         BE ABATED.

1.8      Tenant's Proportionate Share: 51.68%, consisting of the ratio of the
         rentable area of the Premises to the rentable, area of the Building.

1.9      Use of the Premises: GENERAL OFFICES, LIGHT ASSEMBLY, WAREHOUSE AND
         DISTRIBUTION OF MOBILE ELECTRONICS AND RELATED PRODUCTS. No chemical
         processing, nor use of hazardous chemicals, is permitted. TENANT
         INTENDS TO DO INCIDENTAL PAINTING OF PROTOTYPES ON PREMISES AND WILL
         PROVIDE ADEQUATE VENTILATION.

1.10     Tenant Improvement Allowance: Per Exhibit "C."

1.11     Tenant's Address for Notices:

         ELECTRONICS ACCESSORY SPECIALISTS INTERNATIONAL, INC.
         7955 EAST REDFIELD ROAD
         SCOTTSDALE, AZ 85260

         ATTENTION: JEFFREY DOSS, PRESIDENT

1.12     Landlord's Notice Address:

<PAGE>   5

          Horizon Real Estate Group, Inc.
          2999 North 44th Street, Suite 450
          Phoenix, AZ 85018

          with a copy to:

          Charles M.  King
          Fennemore Craig
          Two North Central Avenue
          Suite 2200
          Phoenix, Arizona 85004-2390

1.13     Brokers: Horizon Real Estate Group, Inc., representing Landlord, and
B-H Enterprises of Arizona, Inc., representing Tenant.

ARTICLE 2   DELIVERY, TERM AND CONSTRUCTION

2.1      Term. The Term of this Lease, and the dates of commencement and
expiration of the Term, are set forth in Sections 1.5 and 1.6. Landlord shall
not be liable for any direct or consequential damages resulting from delayed
delivery of the Premises (by reason of delayed construction or otherwise) and
the scheduled Commencement Date and the Expiration Date shall be postponed by an
amount equal to the period of delay. In the event the Premises are ready for
occupancy by Tenant in accordance with Exhibit C prior to January 1, 1997,
Tenant agrees to accept early occupancy, and the Commencement date shall be
adjusted to the date of possession. IN THE EVENT THE PREMISES ARE NOT DELIVERED
TO TENANT WITH ALL WORK REQUIRED IN EXHIBIT C SUBSTANTIALLY COMPLETED WITHIN 90
DAYS AFTER TENANT HAS EXECUTED THIS LEASE AND SIGNED ITS APPROVAL OF THE WORKING
DRAWINGS (SUBJECT TO TENANT DELAY), BASE RENTAL SHALL BE ABATED TO THE EXTENT OF
ONE DAY'S RENT PER DAY FOR EACH DAY OF DELAY (EXCEPTING TENANT DELAY) PAST THE
90TH DAY UNTIL THE WORK IS SUBSTANTIALLY COMPLETED.

2.2      Memorandum. At the request of either party at any time following
completion of the work described in Exhibit "C," a memorandum shall be executed
reflecting the date of completion of the work and confirming the Commencement
Date and Expiration Date.

2.3      Area Measurement. Landlord and Tenant have verified the area of the
Premises to their mutual satisfaction, and neither the Base Rent nor any other
obligation under this Lease shall be subject to adjustment as a result of any
future remeasurement of the Premises.

2.4      Condition. Landlord shall have no obligation to make any improvements
or alterations to the Premises or the Project whatsoever, except that Landlord
shall perform all of its obligation in accordance with Exhibit C ("Landlord's
Construction"). Subject to completion of Landlord's Construction and performance
of Landlord's maintenance and repair obligations under this Lease, Tenant
accepts the Premises in an AS IS condition, with all faults. Landlord represents
that so far as it is aware, there exist no substances or materials within the
Premises in violation of applicable environmental laws, including without
limitation the Resource Conservation and Recovery Act of 1976 and the
Comprehensive Environmental Response, Compensation and Liability Act, there
exist no asbestos-containing materials within the Premises, and there exist no
underground storage tanks in the Project. If any contamination of the Project in
violation of applicable environmental law not caused by Tenant shall be
discovered, Landlord shall remediate the contamination at its sole expense in
accordance with applicable law. LANDLORD REPRESENTS THAT THE PREMISES COMPLIED
WITH GOVERNING CODES AND ADA (AMERICANS WITH DISABILITIES ACT) REQUIREMENTS
PRIOR TO TENANT'S OCCUPANCY. TENANT'S RESPONSIBILITY FOR ADA COMPLIANCE SHALL BE
WITH RESPECT TO ANY UNIQUE OR SPECIFIC TENANT USE OF THE PREMISES. ADDITIONALLY,
ANY CHANGE IN FUTURE ENVIRONMENTAL OR ADA LAW WHICH NECESSITATES ACTION AT THE
PROPERTY, SHALL BE AT LANDLORD'S SOLE COST AND EXPENSE, UNLESS SUCH ACTION IS
REQUIRED DUE TO TENANT'S SPECIFIC USE.

2.5      Extension Option. Provided that Tenant is not then in default under
this Lease beyond any applicable cure period, and provided Tenant has not
exercised its Expansion Option, Tenant shall have the option to extend the
Initial Term of this Lease by ONE PERIOD OF TWO YEARS (the "Renewal Term") by
written notice given to Landlord not less than 120 days before the expiration of
the Initial Term. If the option is not exercised in a timely, manner, then the
Lease shall automatically expire at the end of the Initial Term, and Tenant
shall surrender possession of the Premises in accordance with the terms of this
Lease. All of the terms and conditions of this Lease shall continue to apply
during the Renewal Term. Tenant also is granted an Expansion Option (in Article
26) in this Lease. SHOULD THE EXPANSION OPTION BE EXERCISED, THE INITIAL TERM
HEREOF IS AUTOMATICALLY EXTENDED (SEE ARTICLE 26). Further, should the Expansion
Option be exercised, Tenant shall have the option to extend the Initial Term of
this Lease by UP TO THREE (3) ONE (1) YEAR LEASE TERMS by written notice given
to Landlord not less than 180 days before the expiration of the current term.
The three one year options shall be in lieu of the single two year option
described above.

                                       2
<PAGE>   6

ARTICLE 3   USE OF PREMISES

3.1      Permitted Uses. Tenant shall use and occupy the Premises for the
purposes set forth in Section 1.9 and for no other purpose whatsoever without
Landlord's prior written consent. TENANT SHALL NOT OPERATE ITS BUSINESS ON THE
PREMISES PRIMARILY AT NIGHT.

3.2      Insurance Restrictions. Tenant shall not perform any act which would
cause the cancellation of any insurance policies related to the Project. Tenant
shall reimburse Landlord for any increases in insurance premiums paid by
Landlord directly related to the nature of Tenant's use of the Premises or the
nature of Tenant's business. AS OF THE DATE OF EXECUTION HEREOF, LANDLORD IS NOT
AWARE OF ANY PLANNED OR PENDING INCREASE IN SAID PREMIUM RELATED TO TENANT'S
PERMITTED USE.

3.3      Improvements. If due to the nature of Tenant's use of the Premises,
improvements or alterations are necessary to comply with any requirements
imposed by law, Tenant shall pay the entire cost of the improvements or
alterations. LANDLORD SHALL CAUSE ALL ALTERATIONS CONSTRUCTED BY IT IN
ACCORDANCE WITH EXHIBIT C TO COMPLY WITH THE AMERICANS WITH DISABILITIES ACT,
BUT TENANT SHALL BE RESPONSIBLE FOR ANY FURTHER ALTERATIONS TO THE PREMISES
REQUIRED BY THAT ACT TRIGGERED BY ALTERATIONS MADE BY TENANT BEYOND THE SCOPE OF
EXHIBIT C.

3.4      Prohibitions. Tenant shall not cause or maintain any nuisance in or
about the Premises and shall keep the Premises free of debris, rodents, vermin
and anything of a dangerous, noxious or offensive nature or which would create a
fire hazard (through undue load on electrical circuits or otherwise) or undue
vibration, noise or heat. Tenant shall not cause the safe floor loading capacity
to be exceeded. Tenant shall not disturb or interfere with the quiet enjoyment
of the premises of any other tenant.

3.5      Common Areas. All of the portions of the Project made available by
Landlord for use in common by tenants and their employees and invitees ("Common
Areas") at all times shall remain subject to Landlord's exclusive control and
Landlord shall be entitled to make such changes in the Common Areas as it deems
appropriate. Tenant shall be entitled to the use of 50% of the uncovered,
non-visitor parking spaces in the north parking lot of the Project on an
unreserved, first come, first serve basis; Tenant shall be entitled to 50% of
the covered, reserved parking spaces in the north parking lot of the Project;
Tenant shall be entitled to the use of not more than twelve (12) covered,
reserved parking spaces in the south parking lot; each of such covered, reserved
spaces in the south parking lot shall be provided rent-free. Additional covered
spaces in the south parking lot, when available and when reserved for Tenant,
shall be subject to a non-discriminatory monthly charge (not to exceed $25 per
space per month) payable as additional rent hereunder. Tenant shall be entitled
to the use of uncovered, unreserved parking spaces in the south parking area of
the Project on a first come, first serve basis in common with other tenants in
the Project, provided, however: Phoenix Newspapers, another tenant in the
Project, shall be entitled to the exclusive use of up to 80% of the uncovered
parking spaces in the south parking lot between the hours of 11:00 p.m. and 5:30
a.m., and at all other times not more than 100 parking spaces in the Project;
TENANT SHALL BE ENTITLED TO THE EXCLUSIVE USE OF UP TO 77 SPACES IN THE SOUTH
PARKING LOT DURING REGULAR BUSINESS HOURS (M-F 8:00A.M.-5:00P.M.). Landlord
reserves the right to reduce the number of unreserved spaces available to Tenant
in the lot in front of the Building in order to satisfy reasonable requirements
for visitor or handicapped parking so long as the reduction is equitably shared
by all tenants having parking rights in that lot. Landlord also reserves the
right to mark uncovered spaces as reserved spaces, in which case Tenant's spaces
shall be marked with its name. Tenant shall have the non- exclusive use of the
truckwell in the south parking area in common with other tenants in the Project.
However, Tenant shall be subject to reasonable restrictions by Landlord on its
use and access to the truckwell at such times and on such days as Phoenix
Newspapers, Inc. receives its deliveries of printed newspapers for immediate
distribution.

3.6      Rules and Regulations. Tenant shall comply and shall cause its
employees to comply with the rules and regulations for the Project. The current
rules and regulations are attached as Exhibit D. Landlord from time to time by
notice to Tenant may amend the rules and regulations and establish other
reasonable non-discriminatory rules and regulations for the Project.

3.7      Compliance with Law. Without in any manner limiting any other provision
of this Lease, Tenant hereby warrants and agrees for the full term of any
obligations under this Lease:

         (a)      to comply fully with all federal, state and local laws, rules,
orders, or regulations pertaining to health or the environment ("Environmental
Laws"), including, without limitation, the comprehensive Environmental Response,
Compensation, and Liability Act of 1980, as amended ("CERCLA") and the Resource
Conservation and Recovery Act of 1987, as amended ("RCRA").

                                       3
<PAGE>   7

         (b)      that Tenant will not dispose of nor permit or acquiesce in the
disposal of any hazardous or toxic waste (including, but not limited to, any
paints, solvents, or paint thinners) products on, under or around the Premises,
UNLESS IN DESIGNATED CONTAINERS AND PROCEDURES IMPLEMENTED BY AND AT TENANT'S
SOLE COST AND EXPENSE.

         (c)      to defend, INDEMNIFY and hold harmless Landlord for any and
all costs, claims, demands, damages including attorneys' fees and court costs
and investigatory and laboratory fees, related to any breach of this Lease by
Tenant, including, without limitation, any adverse health or environmental
condition (including without limitation any violation of Environmental Laws)
CAUSED BY TENANT during the term of this Lease. This indemnification to Landlord
shall survive the termination of the Lease by ONE YEAR FOR DISCOVERY OF SUCH
CONDITIONS OR RECEIPT OF CLAIMS, WHICHEVER IS FIRST TO OCCUR. HOWEVER, THE
INDEMNIFICATION SHALL SURVIVE THE TERMINATION OF THE LEASE BEYOND ONE YEAR FOR
PURPOSE OF DEFENDING CLAIMS MADE OR CURING BREACHES DISCOVERED DURING THE PERIOD
ENDING ONE YEAR AFTER THE TERMINATION OF THE LEASE.

         (d)      to comply with all reporting obligations imposed under the
Federal Emergency Planning and Community Right to Know Act of 1986 and any
similar state or local laws, rules or regulations.

         (e)      to comply with all pretreatment requirements imposed by law
with respect to the disposal of waste or effluent into the sanitary sewer
system;

         (f)      to use its best efforts to prevent any dumping, spillage,
leakage or runoff of substances regulated under. Environmental Laws ("Regulated
Substances") into dry wells, storm drains, water retention areas, Common Areas
or any areas where such substances could be absorbed into the soil;

         (g)      to obtain and maintain all permits required by federal, state
or local laws, rules or regulations;

         (h)      to prepare, and upon request provide a copy to Landlord of,
all response plans required by applicable law; and

         (i)      not to keep, store, or use within the Premises any Regulated
Substances except such quantities that are reasonably necessary for Tenant's
business and such quantities which are customarily associated with office usage,
such as copier AND CLEANING supplies.

3.8      Audit. UPON REASONABLE NOTICE, but not more than twice in any one year
(unless warranted by an incident CAUSED BY TENANT, ITS AGENTS OR EMPLOYEES)
Landlord may retain an environmental consultant or engineer to conduct an audit
or environmental assessment of the Premises and Tenant's compliance with
applicable laws, rules and regulations. Tenant shall extend its full cooperation
with the audit or investigation. If Tenant is found not to be substantially in
compliance with applicable law, all reasonable costs associated with AUDITS OR
ASSESSMENTS INITIATED FOLLOWING AN INCIDENT IN WHICH TENANT, ITS AGENTS OR
EMPLOYEES ARE FOUND RESPONSIBLE shall be paid by Tenant to Landlord upon demand;
otherwise all costs shall be borne by Landlord. In addition, Tenant, at
Landlord's request from time to time, shall complete such questionnaires and
provide such information with respect to Tenant's activities and operations on
the Premises as Landlord shall reasonably require.

ARTICLE 4   SECURITY DEPOSIT

UPON EXECUTION OF THIS LEASE TENANT SHALL BE CREDITED FOR ITS PRIOR DEPOSIT WITH
LANDLORD OF A SECURITY DEPOSIT IN THE AMOUNT SET FORTH IN SECTION 1.4 to secure
Tenant's performance of this Lease. The deposit shall not bear interest, shall
not be required to be maintained in a separate account, and shall be returned,
less any unpaid claims against Tenant, upon the expiration of this Lease and the
surrender of possession of the Premises, to Tenant or the last assignee of
Tenant's interest.

ARTICLE 5   RENT

5.1      Base Rent. Tenant shall pay to Landlord, in advance, on the first day
of each calendar month, beginning on the Commencement Date, Base Rent in the
amount set forth in Section 1.7, subject to adjustment under Section 5.2.

5.2      Adjustments. The Base Rent shall not be subject to adjustment during
the Initial Term hereunder (EXCEPT PURSUANT TO ARTICLE 26). IN THE EVENT TENANT
EXERCISES ITS TWO YEAR RENEWAL OPTION, THE BASE RENT

                                       4
<PAGE>   8

FOR THE RENEWAL TERM SHALL BE $.80 PER RENTABLE SQUARE FOOT PER MONTH. IN THE
EVENT TENANT EXERCISES ANY OF ITS THREE ONE YEAR RENEWAL OPTIONS FOLLOWING
EXERCISE OF ITS EXPANSION OPTION, THE BASE RENT FOR EACH OPTION TERM SHALL BE
ADJUSTED UPWARDS TO THE GREATER OF THE PREVAILING RATE FOR COMPARABLE SPACE IN
THE SCOTTSDALE AIRPARK, OR 5% HIGHER THAN THE BASE RENT FOR THE TERM THEN
ENDING.

5.3      Late Charges and Interest. Tenant shall pay to Landlord a late charge
equal to 5% of the Base Rent or any other amount payable under this Lease is not
paid within fifteen days after the date it is due and payable. The late charge
constitutes liquidated damages to compensate Landlord for costs and
inconveniences of special handling and disruption of cash flow and is not a
penalty. The assessment or collection of a late charge shall not constitute the
waiver of a default and shall not bar the exercise of other remedies for
nonpayment. In addition to the late charge, all amounts not paid within fifteen
days after the date due shall bear interest from the date due (i) until the
happening of an Event of Default, at the rate of 12% per annum and (ii)
thereafter, at the rate set forth in Section 21.2.

5.4      Excise Taxes. Tenant shall pay to Landlord all sales, use, transaction
privilege, or other excise tax levied, or imposed upon, or measured by, any
amount payable by Tenant under this Lease. IN ACCORDANCE WITH ARIZONA LAW,
TENANT'S PAYMENT OF ITS SHARE OF TENANT IMPROVEMENT COSTS OVER AND ABOVE THE
ALLOWANCE PROVIDED BY LANDLORD SHALL NOT BE SUBJECT TO THE TRANSACTION PRIVILEGE
TAX, EXCEPT THAT SUCH COSTS ARE INTENDED TO INCLUDE SALES TAX CHARGED BY THE
CONTRACTOR TO LANDLORD.

5.5      Obligations Are Rent. All amounts payable to Landlord under this Lease
constitute rent and shall be payable without notice, demand, deduction or offset
to such person and at such place as Landlord may from time to time designate by
written notice to Tenant.

5.6      Proration. Base Rent payable with respect to a period consisting of
less than a full calendar month shall be prorated.

ARTICLE 6   OPERATING COSTS

6.1      Tenant's Share. Tenant shall pay to Landlord Tenant's Proportionate
Share of the increase, if any, in Operating Costs for each calendar year above
the Operating Costs incurred in the calendar year 1997. TENANT'S PROPORTIONATE
SHARE OF THE INCREASE IN 1997 IS $0.00, BY DEFINITION.

6.2      Estimates. From time to time after the end of 1997, Landlord shall by
written notice specify Landlord's estimate of Tenant's obligation under Section
6.1. Tenant shall pay one-twelfth of the estimated annual obligation on the
first day of each calendar month.

6.3      Annual Reconciliation. Within 180 days after the end of each calendar
year, Landlord shall provide to Tenant a written summary of the Operating Costs
for the calendar year, determined on an accrual basis in accordance with
generally accepted accounting principles, and broken down by principal
categories of expense. The statement also shall set forth Tenant's Proportionate
Share of Operating Costs and shall show the amounts paid by Tenant on account.
Any difference between Tenant's obligation and the amounts paid by Tenant on
account shall be paid or refunded, as the case may be, within fifteen days after
the statement is provided. IN THE EVENT TENANT DISAGREES WITH SAID STATEMENT, IT
MAY, AT ITS SOLE COST AND EXPENSE, CONDUCT AN AUDIT TO VERIFY LANDLORD'S
RECONCILIATION BY A PRACTICING CPA. TENANT SHALL HAVE 120 DAYS FOLLOWING ITS
RECEIPT OF SAID STATEMENT TO CONDUCT ITS AUDIT AND LANDLORD AGREES TO TIMELY
PROVIDE ALL DOCUMENTATION REASONABLY REQUIRED BY THE CPA TO CONDUCT SAID AUDIT.
IN THE EVENT TENANT AND LANDLORD DISAGREE ON THE RESULTS OF TENANT'S AUDIT
FINDINGS, THEN A MUTUALLY AGREED TO CPA SHALL BE HIRED TO CONDUCT ITS OWN AUDIT.
COST OF THE JOINTLY APPOINTED CPA SHALL BE BORNE 50/50 BETWEEN LANDLORD AND
TENANT. THE RESULTS OF THE JOINTLY APPOINTED AUDIT SHALL BE FINAL AND BINDING.
FOLLOWING THE AUDIT(S), ANY REMAINING BALANCE DUE LANDLORD SHALL BE PAID
FORTHWITH, AND ANY ADJUSTMENT IN FAVOR OF TENANT SHALL BE REFUNDED TO TENANT
FORTHWITH.

6.4      Partial Year Proration; Variable Cost Adjustment. During the last year
of the Term, Tenant's responsibility for Operating Costs shall be adjusted in
the proportion that the number of days of that calendar year during which the
Lease is in effect bears to 365. Tenant's obligations under this Article 6 for
the payment of Operating Costs during the Lease Term, including the payment of
any deficiency following receipt of the annual statement under Section 6.3,
shall survive the expiration or termination of this Lease BY A PERIOD NOT TO
EXCEED ONE YEAR. LANDLORD'S OBLIGATIONS UNDER THIS ARTICLE 6 FOR THE PAYMENT OF
OPERATING COSTS DURING THE LEASE TERM, INCLUDING THE REFUNDING OF ANY
OVERPAYMENT BY TENANT FOLLOWING RECEIPT OF THE ANNUAL STATEMENT UNDER SECTION
6.3, SHALL SURVIVE THE EXPIRATION OR TERMINATION OF THIS LEASE BY A PERIOD NOT
TO EXCEED ONE YEAR. If the mean level of occupancy of the Building during a
calendar year is less than 100% of the

                                       5
<PAGE>   9

rentable area, the Operating Costs shall be adjusted to reflect the fact that
some costs, such as HVAC, vary with level of occupancy while other costs, such
as real estate taxes, may not. In order to allocate those variable costs to
Occupied space while allocating non-variable costs to occupied and unoccupied
space alike, Landlord shall determine, IN ITS REASONABLE DISCRETION, what the
total Operating Costs would have been had the Building been fully occupied
during the entire calendar year (AND THE YEAR 1997, IF APPLICABLE) on the
average, and that adjusted total shall be the figure employed in the statement
and calculations described in Sections 6.1 and 6.3.

6.5      "Operating Costs" consist of all costs of operating, maintaining and
repairing the Project, including, without limitation, the following:

         (a)      Premiums for property, casualty, liability, rent interruption
or other insurance.

         (b)      Reasonable salaries, wages and other amounts paid or payable
for personnel including the Project manager, superintendent, operation and
maintenance staff, and other employees of Landlord involved in the maintenance
and operation of the Project, including contributions and premiums towards
fringe benefits, unemployment and worker's compensation insurance, pension plan
contributions and similar premiums and contributions and the total charges of
any independent contractors or managers engaged in the repair, care, maintenance
and cleaning of any portion of the Project, TO THE EXTENT TIME IS SPENT AND
WAGES AND OTHER AMOUNTS ARE PROPORTIONATELY ALLOCABLE.

         (c)      Cleaning, sweeping, restriping or sealcoating of parking
areas.

         (d)      Landscaping, including irrigating, trimming, mowing,
fertilizing, seeding, and replacing plants.

         (e)      Utilities, including fuel, gas, electricity, water, sewer, and
other services, except that costs of electrical power provided to the Premises
shall be paid as provided in Article 12.

         (f)      Maintaining, operating, repairing and replacing equipment
(REPLACEMENT COSTS BEING LIMITED BY 6.5(k)).

         (g)      Other items of repair or maintenance of the Project, including
roofing repairs and exterior painting not to exceed $7,500 per annum.

         (h)      Policing and security, if any, and sprinkler monitoring and
testing charges.

         (i)      The cost of the rental of any equipment, including sprinkler
monitoring equipment, and the cost of supplies used in the maintenance and
operation of the Project.

         (j)      Audit fees and the cost of accounting services incurred in the
preparation of statements referred to in this Lease and financial statements,
and in the computation of the rents and charges payable by tenants of the
Project.

         (k)      Costs of capital expenditures incurred for the purpose of
reducing Operating Costs, and costs of improvements, repairs, or replacements
which otherwise constitute Operating Costs under this Article but which are
properly charged to capital accounts shall not be included in Operating Costs in
a single year but shall instead be amortized over their useful lives, as
determined by the Landlord in accordance with generally accepted accounting
principles, and only the annual amortization amount shall be included in
Operating Costs.

         (l)      A reasonable fee for the administration and management of the
Project appropriate to the nature of the Project as reasonably determined by the
Landlord from time to time, but not in excess of prevailing market rates, AND
SUBJECT TO A MAXIMUM INCREASE, IF ANY, OF 5% PER ANNUM.

         (m)      Intentionally omitted.

         (n)      General and special real and personal property taxes and
assessments for the Project, including assessments payable to the Scottsdale
Airpark Property Owners' Association, and expenses incurred in efforts to reduce
taxes or assessments. Special assessments shall be included only to extent of
the annual installment if the assessment is payable over a period of years or if
an option to pay the assessment over a term of years exists.

         (o)      Refuse removal, to the extent not contracted for and paid
directly by other tenants. To the extent another Tenant contracts for a pays
directly for refuse removal, Tenant's Proportionate Share of refuse removal
costs shall be adjusted to the proportion that the area of the Premises bears to
the area of the Project less the area

                                       6
<PAGE>   10

of space leased to tenant contracting for separate refuse removal services.

6.6      Exclusions. Notwithstanding anything to the contrary in Section 6.5,
"Operating Costs" shall not include:

         (a)      Amounts reimbursed by other sources, such as insurance
proceeds, equipment warranties, judgments or settlements.

         (b)      Utilities or other expenses paid directly by tenants to
suppliers or paid by tenants to Landlord for separately metered or special
services and electrical power provided to leased space in the Project.

         (c)      Ground rents.

         (d)      Payments on any mortgage or other encumbrance.

         (e)      Premiums on liability insurance coverage in excess of
$5,000,000.

         (f)      Construction of tenant improvements.

         (g)      Replacement of the roof and replacements (but not repairs) of
other structural elements.

         (h)      Parking lot resurfacing.

         (i)      Leasing commissions.

         (j)      Correction of defects in material or workmanship in the
initial construction of the Project.

         (k)      General overhead and administrative expenses of Landlord not
directly related to the operation of the Project.

         (l)      Costs of negotiating or enforcing leases of other tenants.

         (m)      Costs for preventive maintenance or repair of heating,
ventilation, and air conditioning equipment serving the Premises, which shall be
paid for by Tenant pursuant to Article 11.3.

6.7      Excess Expenses. Notwithstanding anything to the contrary in this
Article 6, if any tenant's (including Tenant's) use or occupancy of its leased
premises results in expenditures for refuse removal, exterior lighting, or truck
driveway repair and maintenance in excess of what would be typical for a tenant
of a facility comparable to the Project, then the portion of such costs in
excess of typical levels of demand shall be excluded from Operating Costs.
Tenant shall pay to Landlord its allocable share of such costs (based on
Tenant's share of such excessive usage) directly to Landlord periodically upon
request. In the event of a dispute with respect to whether Tenant's use results
in excessive exterior lighting or truck driveway repair and maintenance, or over
the portion of such costs to be allocated to Tenant, a binding determination
shall be made by the regularly employed electrical or paving contractor familiar
with the Project. If requested, Tenant shall make monthly payments on account of
Tenant's obligations under this Section on an estimated basis, subject to annual
reconciliation in the same manner as Operating Costs. Landlord's obligations
with respect to record keeping and Tenant's rights to review related records
shall be the same as those related to records of Operating Costs. TENANT SHALL
ALSO BE RESPONSIBLE FOR THE COST OF ADDITIONS TO THE PROJECT'S ELECTRICAL OR
HVAC CAPACITY WARRANTED BY TENANT'S INSTALLATION OF ELECTRIC DEVICES AND
EQUIPMENT IN THE PREMISES WHICH INCREASE RECEPTACLE LOADS ABOVE 6.6 WATTS PER
SQUARE FOOT. AT THE TIME LANDLORD DETERMINES THAT THE THRESHOLD OF 6.6 WATTS PER
SQUARE FOOT HAS BEEN REACHED OR EXCEEDED, LANDLORD SHALL REVIEW TENANT'S
EQUIPMENT AND USAGE WITH TENANT AND DETERMINE THE EXTENT TO WHICH ADDITIONAL
CAPACITY MAY BE REQUIRED. LANDLORD SHALL NOT INSTALL ADDITIONAL CAPACITY AT
TENANT'S EXPENSE UNTIL AFTER PROVIDING TENANT WITH THE ESTIMATED COST THEREOF,
AND ALLOWING TENANT TO REDUCE ITS CAPACITY UTILIZATION.

ARTICLE 7         TAXES

7.1      Landlord shall pay before delinquent all general and special real
property taxes assessed or levied on the Project, to reimbursement under Article
6.

7.2      Tenant shall pay before delinquent all taxes levied or assessed upon,
measured by, or arising from (a) the

                                       7
<PAGE>   11

conduct of Tenant's business; (b) Tenant's leasehold estate; or (c) Tenant's
property.

ARTICLE 8   INSURANCE AND INDEMNITY

8.1      Insurance Policies. Tenant shall, at its expense, take out and keep in
full force and effect the following insurance:

         (a)      All-risk property insurance including sprinkler leakage in an
amount equal to the full replacement cost of all property owned by Tenant.

         (b)      INTENTIONALLY DELETED.

         (c)      Plate glass insurance coverage.

         (d)      Comprehensive liability insurance applying to the use and
occupancy of the Premises and the business operated by Tenant, including
coverage for "premises/operations", "products and completed operations", and
"blanket contractual" liabilities, written on an occurrence basis with limits
not less than $1,000,000, naming Landlord, its agents, affiliates and contract
property manger as additional insureds.

         (e)      At all time during the Lease Term, Tenant shall procure and
maintain workers' compensation insurance in accordance with applicable law and
employer's liability insurance with a limit not less than $500,000 BODILY INJURY
EACH ACCIDENT; $500,000 BODILY INJURY BY DISEASE - EACH PERSON; AND $500,000
BODILY INJURY BY DISEASE - POLICY LIMIT.

8.2      Policy Requirements. Tenant's insurance policies shall:

         (a)      where applicable, contain the mortgagee's standard mortgage
clause and in any event a waiver of any subrogation rights which Tenant's
insurers may have against Landlord and against those for whom the Landlord is in
law responsible;

         (b)      be taken out with insurers reasonably acceptable to Landlord
and be in a form satisfactory from time to time to Landlord;

         (c)      be non-contributing and apply as primary and not as excess to,
any other insurance available to the Landlord;

         (d)      not be invalidated with respect to the interests of the
Landlord and the holder of any encumbrance on the Project by reason of any
breach or violation by Tenant of any warranties, representations, declarations
or conditions contained in the policies; and

         (e)      contain an undertaking by the insurers to notify the Landlord,
and the holder of any encumbrance on the Project designated by Landlord, in
writing not less than thirty days prior to any material change, cancellation or
termination.

8.3      Evidence of Coverage. Tenant shall deliver to Landlord certificates of
insurance or, if required by Landlord, certified copies of each such insurance
policy: (a) as soon as practicable after the placing of the required insurance
and (b) periodically thereafter before expiration, renewal or replacement of the
policies then in force. No review or approval of any such insurance certificate
by Landlord shall derogate or diminish Landlord's rights or Tenant's
obligations. Tenant shall not take possession of the Premises without having
complied with the requirements of this Section.

8.4      Indemnity and Exculpation. Tenant shall defend, indemnify and hold
Landlord harmless from any and all claims arising from Tenant's use of the
Premises or the conduct of its business or from any activity, work, or thing
done, permitted or suffered by Tenant in or about the Premises, regardless of
fault or negligence which is imputed to Landlord as the owner of the PROJECT but
which involves a condition of the Premises within the control of Tenant, its
employees or contractors. Tenant shall not be required, however, to indemnify
Landlord against a claim arising from Landlord's active negligence, breach of
lease, breach of contract, or willful misconduct. Landlord shall not be liable
and Tenant hereby waives all claims for any damage to any property in or about
the Premises or the Project or injury or inconvenience to Tenant's business, by
or from any cause whatsoever (including without limiting the foregoing, rain or
water leakage of any character from the roof, windows,

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<PAGE>   12

walls, basement, pipes, plumbing works or appliances). Tenant acknowledges that
it is protecting itself against logs by maintaining appropriate insurance
coverage.

8.5      Landlord's Policies. No insurable interest is conferred upon Tenant
under any policies of insurance carried by Landlord, and Tenant shall not be
entitled to share or receive proceeds of any insurance policy carried by
Landlord.

ARTICLE 9   FIRE AND CASUALTY

9.1      Termination Rights. If all or part of the Premises is rendered
untenantable by damage from fire or other casualty which in Landlord's
reasonable determination cannot be substantially repaired (employing normal
construction methods without overtime or other premium) under applicable laws
and governmental regulations within, 180 days from the date of the fire or other
casualty, then either Landlord or Tenant may elect to terminate this Lease as of
the date of such casualty by written notice delivered to the other not later
than ten days after notice of such determination is given by Landlord. Landlord
shall provide its determination of the estimated time to restore the Premises
within thirty days after the casualty. IN THE EVENT THE LEASE IS TERMINATED AS A
RESULT OF THIS CLAUSE, RENT SHALL BE ABATED TO THE EXTENT OF THE DAMAGED AREA OR
UTILITY OF THE PREMISES, AND PRO RATED TO THE DATE OF THE CASUALTY. ANY UNEARNED
RENT PREVIOUSLY PAID BY TENANT SHALL BE REFUNDED BY LANDLORD.

9.2      Restoration. If in Landlord's reasonable determination the damage
caused by the fire or casualty can be substantially repaired (employing normal
construction methods without overtime or other premium) under applicable laws
and governmental regulations within 180 days from the date of the fire or other
casualty, or if neither party exercises its right to terminate under Section
9.1, Landlord shall repair such damage other than damage to furniture, chattels
or trade fixtures which do not belong to the Landlord, which shall be repaired
forthwith by Tenant at its own expense.

9.3      Abatement. During any period of restoration, the Base Rent payable by
Tenant shall be proportionately reduced to the extent that the Premises are
thereby rendered untenantable from the date of casualty until completion by
Landlord of the repairs to the Premises (or the part thereof rendered
untenantable) or until Tenant again uses the Premises (or the part thereof
rendered untenantable) in its business, whichever first occurs.

9.4      Demolition of Project. Notwithstanding anything to the contrary in
Section 9.1, if all or a substantial part (whether or not including the
Premises) of the Project is rendered untenantable by damage from fire or other
casualty to such a material extent that in the opinion of Landlord the Project
must be totally or partially demolished, whether or not to be reconstructed in
whole or in part, Landlord OR TENANT may elect to terminate this Lease as of the
date of the casualty (or on the date of notice if the Premises are unaffected by
such casualty) by written notice delivered to Tenant not more than sixty days
after the date of the fire or casualty.

9.5      Agreed Remedies. Except as specifically provided in this Article, there
shall be no reduction of rent and Landlord shall have no liability to Tenant by
reason of any injury to or interference with Tenant's business or property
arising from fire or other casualty, howsoever caused, or from the making of any
repairs resulting therefrom in or to any portion of the Project or the Premises.
Tenant waives any statutory or other rights of termination by reason of fire or
other casualty, it being the intention of the parties to provide specifically
and exclusively in this Article for the rights of the parties with respect to
termination of this Lease as a result of a casualty.

ARTICLE 10  CONDEMNATION

10.1     Automatic Termination. If during the Term all or any MATERIAL part of
the Premises is permanently taken for any public or quasi-public use under any
statute or by right of eminent domain, or purchased under threat of such taking,
this Lease shall automatically terminate on the date on which the condemning
authority takes possession of the Premises.

10.2     Optional Termination. If during the term any part of the Project is
taken or purchased by right of eminent domain or in lieu of condemnation,
whether or not the Premises are directly affected, then if in the reasonable
opinion of Landlord substantial alteration or reconstruction of the Project is
necessary or desirable as a result thereof, or the amount of parking available
to the Project is materially and adversely affected, Landlord shall have the
right to terminate this Lease by giving Tenant at least thirty days written
notice of such termination.

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<PAGE>   13

10.3     Award. Landlord shall be entitled to receive and retain the entire
award or consideration for the affected lands and improvements and Tenant shall
not have or advance any claims against Landlord for the value of its property or
its leasehold estate or the unexpired term of this Lease or for costs of removal
or relocation or business interruption expense or any other damages arising out
of the taking or purchase. Nothing herein shall give Landlord any interest in or
preclude Tenant from seeking and recovering on its own account from the
condemning authority any award of compensation attributable to the taking or
purchase of Tenant's chattels or trade fixtures or attributable to Tenant's
relocation expenses provided that any such separate claim by Tenant shall not
reduce or adversely affect the amount of Landlord's award. If any such award
made or compensation paid to Tenant specifically includes an award or amount for
Landlord, Tenant shall promptly account therefor to Landlord.

ARTICLE 11  MAINTENANCE

11.1     By Tenant. Tenant shall maintain the Premises and the improvements
therein (including all doors, plate glass, and electrical and plumbing systems
serving the Premises), in good condition and repair, utilizing licensed and
bonded contractors. Tenant shall provide all janitorial services required
for the Premises. IF LANDLORD, IN ITS REASONABLE DISCRETION, FINDS THE
PERFORMANCE OF TENANT'S CONTRACTOR(S) TO BE UNSATISFACTORY, OR IN ANY WAY
DETRIMENTAL TO THE OPERATION OF THE PROJECT, LANDLORD MAY REQUIRE TENANT TO
DISMISS SAID CONTRACTOR(S) AND PROVIDE NEW CONTRACTOR(S) ACCEPTABLE TO LANDLORD.
Tenant also shall make such repairs and alterations necessary to comply with the
requirements of any governmental or quasi-governmental authority having
jurisdiction which requirements are applicable based on Tenant's specific use,
of the Premises; Landlord shall bear the costs of alterations to comply with
governmental requirements of a general nature affecting any occupancy.

11.2     By Landlord. Landlord shall maintain the Project and all Common Areas
in good condition and repair in accordance with standards then prevailing for
comparable properties of like age and character. Landlord shall repair
structural defects in roof or walls, shall repair and maintain any common
utility facilities in the Common Areas and shall maintain and repair all
heating, ventilation and air conditioning systems and equipment. In the event
heating, ventilation, or air conditioning equipment serving the Premises
requires repair, Tenant shall contact Landlord and Landlord shall promptly carry
out all repairs. Notwithstanding anything to the contrary in Section 11.1,
Landlord shall be responsible for any facilities located in the Project that are
shared with another tenant.

11.3     Cost Reimbursement. Tenant shall pay within thirty days after demand
from time to time, in addition to its obligations under Article 6, all amounts
REASONABLY incurred by Landlord for preventative maintenance contracts and for
maintenance and repair (excluding replacements) for heating, ventilation and air
conditioning systems or equipment serving the Premises. MINIMUM SPECIFICATIONS
FOR PREVENTIVE MAINTENANCE CONTRACTS SHALL INCLUDE FILTER CHANGES, LUBRICATION
AND INSPECTIONS MONTHLY DURING THE PERIOD FROM JUNE THROUGH SEPTEMBER AND
BI-MONTHLY FROM OCTOBER THROUGH MAY. In the case any such systems or equipment
shared with another tenant, the costs shall be equitably apportioned by
Landlord. NOTWITHSTANDING THE FOREGOING, LANDLORD SHALL WARRANT THE HVAC
EQUIPMENT AGAINST BREAKDOWNS AND FAILURES FOR THE FIRST 90 DAYS OF THE LEASE
TERM AT ITS SOLE COST AND EXPENSE.

ARTICLE 12  UTILITIES

Notwithstanding anything to the contrary in this Lease, Tenant shall pay to
Landlord upon demand all costs of electrical power provided to the Premises,
calculated at the same rates as charged by the utility supplier, as measured by
submeters which shall be installed and read by Landlord. LANDLORD SHALL FURNISH
TENANT WITH A REPORT FROM A QUALIFIED ELECTRICIAN OR ELECTRICAL ENGINEER
CERTIFYING THAT ALL OF THE OTHER TENANTS' USAGE IS BEING. MEASURED BY THEIR
SUBMETERS.

ARTICLE 13  LANDLORD RIGHT OF ENTRY

Upon reasonable notice to Tenant, Landlord shall have access to the Premises for
purposes of showing the Premises to current or prospective lenders, to
prospective purchasers of the Project, and, during the twelve-month period
preceding the expiration of the term of this Lease, to prospective tenants.
Landlord shall at all times have access to the Premises for purposes of
inspection and performing Landlord's obligations and exercising its rights under
this Lease. LANDLORD SHALL MAKE REASONABLE EFFORTS TO MINIMIZE DISRUPTIONS OF
TENANT'S OPERATIONS WHILE EXERCISING ITS RIGHT OF ENTRY.

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<PAGE>   14

ARTICLE 14  SIGNS

Tenant shall not place or permit to be placed any sign, picture, advertisement,
notice, lettering or decoration on any part of the outside of the Premises or
anywhere in the interior of the Premises which is visible from the outside of
the Premises without Landlord's prior written approval, not to be unreasonably
withheld. Landlord acknowledges that Tenant is the largest of three tenants in
the Project, and shall therefore be permitted to exclusive use of the existing
monument sign on Redfield Road for purposes of identifying itself by name
(only), subject to Landlord's prior review of the proposed sign faces and
materials, and subject to Tenant's compliance with any requirements of the
Scottsdale Industrial Airpark Owners Association or the City of Scottsdale.

ARTICLE 15  TENANT ALTERATIONS

15.1     Tenant Alterations. Tenant may from time to time at its own expense
make changes, additions and improvements in the Premises, provided that any such
change, addition or improvement shall:

         (a)      comply with the requirements of any governmental or
quasi-governmental authority having jurisdiction (including, without limitation,
the Americans with Disabilities Act), with the requirements of Landlord's
insurance carriers, and with Landlord's reasonable safety and access
requirements, including restrictions on flammable materials and elevator usage;

         (b)      not be commenced until Landlord has received satisfactory
evidence that all required, permits have been obtained;

         (c)      be made only with the prior written consent of Landlord (which
may be withheld in Landlord's sole discretion, to the extent, IN LANDLORD'S
OPINION, IT NEGATIVELY IMPACTS the structure or electrical, HVAC, plumbing or
sprinkler systems of the Building, but which otherwise shall not be unreasonably
withheld);

         (d)      be constructed in good workmanlike manner and conform to
complete working drawings prepared by a licensed architect and submitted to and
approved by Landlord;

         (e)      be of a quality that equals or exceeds the then current
standard for the Project and comply with all building, fire and safety codes;

         (f)      be carried out only during hours approved by Landlord by
licensed contractors selected by tenant and approved in writing by Landlord
(WHICH APPROVAL SHALL NOT BE UNREASONABLY WITHHELD OR DELAYED), who shall
deliver to Landlord before commencement of the work performance and payment
bonds as well as proof of workers' compensation and general liability insurance
coverage, including coverage for completed operations and contractual liability,
with Landlord and its agents and designees named as additional insureds, in
amounts, with companies, and in form reasonably satisfactory to Landlord, which
shall remain in effect during the entire period in which the work shall be
carried out. Notwithstanding the foregoing, only subcontractors selected or
designated by Landlord may be used to make connection with the Project's main
electrical, plumbing or HVAC systems, except connections to circuit panels,
pipes or ducts within the Premises; and

         (g)      upon completion, be shown on accurate "as built" reproducible
drawings in the form of reverse sepia transparencies or mylars delivered to
Landlord.

15.2     Tenant Installations. Tenant may install in the Premises its usual
trade fixtures and personal property in a proper manner, provided that no
installation shall interfere with or damage the mechanical or electrical systems
or the structure of the Building. Landlord may require that any work that may
affect structural elements or mechanical, electrical, heating, air conditioning,
plumbing or other systems be performed by Landlord at Tenant's cost or by a
contractor designated by Landlord. No antenna or other equipment shall be placed
or installed on the roof without Landlord's prior consent and approval, not to
be unreasonably withheld, as to weight, placement, penetrations, method of
attachment and screening.

15.3     Mechanics Liens. Tenant shall pay before delinquency all costs for work
done or caused to be done by Tenants in the Premises which could result in any
lien or encumbrance on Landlord's interest in the Project or any part thereof,
shall keep the title to the Project and every part thereof free and clear of any
lien or encumbrance in respect of such work, and shall indemnify and hold
harmless Landlord and Landlord's agents

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<PAGE>   15

and employees against any claim, loss, cost, demand or legal or other expense,
whether in respect of any lien or otherwise, arising out of the supply of
material, services or labor for such work. Tenant shall immediately notify
Landlord of any such lien, claim of lien or other action of which it has or
reasonably should have knowledge and that affects the title to the Project or
any part thereof, and shall cause the same to be removed by bonding or otherwise
within five days, failing which Landlord may take such action as Landlord deems
necessary to remove same and the entire cost thereof shall be immediately due
and payable by Tenant to Landlord. If provided by applicable law, Tenant shall
cause such postings to be made and notices given as shall prevent any mechanics'
lien for work done for Tenant from attaching to the Project.

ARTICLE 16  ASSIGNMENT AND SUBLETTING

16.1     Consent Required. Tenant shall not assign its interest under this Lease
or sublet all or any part of the Premises without Landlord's prior written
consent, which shall not be unreasonably withheld OR DELAYED. Tenant shall not
at any time pledge, hypothecate, mortgage or otherwise encumber its interest
under this Lease as security for the payment of a debt or the performance of a
contract. Tenant shall not permit its interest under this Lease to be
transferred by operation of law. Any purported assignment or sublease made
without Landlord's consent, OR FOR WHICH LANDLORD IS NOT FURNISHED WITH A FULLY
EXECUTED COPY OF SUCH ASSIGNMENT OR SUBLEASE, IN FORM AND SUBSTANCE REASONABLY
SATISFACTORY TO LANDLORD, SHALL BE VOID. LANDLORD AGREES NOT TO WITHHOLD ITS
CONSENT TO ASSIGNMENTS OR SUBLEASES IN WHICH THE ASSIGNEE OR SUBLESSEE IS A
COMPANY EITHER WHOLLY OWNED BY TENANT, OR IN WHICH TENANT MAINTAINS A
CONTROLLING, MAJORITY INTEREST.

16.2     Requests for Approval. Landlord shall be under no obligation to decide
whether consent will be given or withheld unless Tenant has first provided to
Landlord: (a) the name and legal composition of the proposed assignee or
subtenant and the nature of its business; (b) the use to which the proposed
assignee or subtenant intends to put the Premises; (c) the terms and conditions
of the proposed assignment or sublease and of any related. transaction between
Tenant and the proposed assignee or subtenant; (d) information related to the
experience, integrity and financial resources of the proposed assignee or
subtenant; (e) such information as Landlord may request to supplement, explain
or provide details of the matters submitted by Tenant pursuant to subparagraphs
(a) through (d); and (f) reimbursement for all costs REASONABLY incurred by
Landlord, including attorneys' fees, in connection with evaluating the request
and preparing any related documentation. Landlord shall respond within 15 days
to such requests; FAILURE OF LANDLORD TO RESPOND WITHIN 15 DAYS SHALL BE DEEMED
APPROVAL.

16.3     Continued Responsibility. Tenant shall remain fully liable for
performance of this Lease, notwithstanding any assignment or sublease, for the
entire Lease Term.

16.4     Excess Proceeds. If consent to an assignment or sublease is given,
Tenant shall pay to Landlord, as additional rent, one half of all amounts
received from the assignee or subtenant in excess of the amounts otherwise
payable by Tenant to Landlord with respect to the space involved, measured on a
per square foot basis, AND AFTER DEDUCTING REASONABLE FEES ACTUALLY PAID FOR
BROKERAGE SERVICES.

16.5     Limitations. Without limiting appropriate grounds for withholding
consent, it shall not be unreasonable for Landlord to withhold consent if the
proposed assignee or subtenant is a tenant in another building owned by Landlord
or by an affiliate of Landlord or of any of Landlord's constituent partners or
principals or if the use by the proposed assignee or subtenant would contravene
this Lease or any restrictive use covenant or exclusive rights granted by
Landlord or if the proposed assignee or subtenant does not intend to occupy the
Premises for its, own use or if the nature of the proposed assignee or subtenant
is not compatible with the Project.

16.6     No Waiver. No consent shall constitute consent to any further
assignment or subletting.

16.7     Transfer by Landlord. Upon a sale or other transfer of the Project (or
a portion thereof containing the Premises) by Landlord, Landlord's interest in
this Lease shall automatically be transferred to the transferee, the transferee
shall automatically assume all of Landlord's obligations under this Lease
accruing from and after the date of transfer, and the transferor shall be
released of all obligations under this Lease arising after the transfer. Tenant
shall upon request attorn in writing to the transferee.

ARTICLE 17  SUBORDINATION AND ATTORNMENT

17.1     Subordination. This Lease is and shall be subject and subordinate in
all respects to all existing and future mortgages or deeds of trust now or
hereafter encumbering the Project or any part hereof. The holder of

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<PAGE>   16

any mortgage or deed of trust may elect to be subordinate to this Lease;
provided, however, that in connection with, any future mortgage or deed of
trust, Tenant shall be entitled to receive as a condition of the subordination a
non-disturbance agreement from the lender on its standard form providing that
Tenant's possession of the Premises shall not be disturbed notwithstanding any
foreclosure or trustee's sale.

17.2     Lender Protection. Upon a transfer in connection with foreclosure or
trustee's sale proceedings or in connection with a default under an encumbrance,
whether by deed to the holder of the encumbrance in lieu of foreclosure or
otherwise, Tenant, if requested, shall in writing attorn to the transferee, but
the transferee shall not be:

         (a)      subject to any offsets or defenses which Tenant might have
against Landlord; or

         (b)      bound by any prepayment by Tenant of more than one month's
installment of rent; or

         (c)      subject to any liability or obligation of Landlord except
those arising after the transfer, OR THOSE WHICH ARE CONTINUING UNFULFILLED
OBLIGATIONS OF LANDLORD AS OF THE TRANSFER. THE TRANSFEREE SHALL NOT, HOWEVER,
BE SUBJECT TO PRE-TRANSFER CLAIMS FOR DAMAGES IN EXCESS OF THE COST TO CURE
UNFULFILLED LANDLORD OBLIGATIONS.

17.3     Documentation. The subordination provisions of this Article shall be
self-operating and no further instrument shall be necessary. Nevertheless
Tenant, on request, shall execute and deliver any and all instruments further
evidencing such subordination.

17.4     Other Transactions. Landlord may at any time and from time to time
grant, receive, dedicate, relocate, modify, surrender or otherwise deal with
easements, rights of way, restrictions, covenants, equitable servitudes or other
matters affecting the Project without notice to or consent by Tenant, SO LONG AS
THEY DO NOT MATERIALLY OR ADVERSELY AFFECT TENANT'S BUSINESS.

ARTICLE 18  ESTOPPEL CERTIFICATES

         Tenant shall at any time within ten days after written request from
Landlord execute, acknowledge and deliver to Landlord a statement in writing:
(a) certifying that this Lease is unmodified and in full force and effect (or,
if modified, stating the nature of such modification and certifying that this
Lease, as so modified, is in full force and effect) and the date to which the
rent and other charges are paid in advance, if any; (b) confirming the
commencement and expiration dates of the term; (c) confirming the amount of the
security deposit held by Landlord; (d) acknowledging that there are not, to
Tenant's knowledge, any uncured defaults on the part of Landlord hereunder, or
specifying such defaults if any are claimed; and (e) confirming such other
matters as to which Landlord may reasonably request confirmation. Any such
statement may be conclusively relied upon by a prospective purchaser or
encumbrancer of the Premises or the Project. If Landlord desires to finance or
refinance the Project, Tenant hereby agrees to deliver to any lender designated
by Landlord financial statements of Tenant as may be reasonably required by such
lender. SUCH STATEMENTS SHALL BE LIMITED TO THE MOST RECENTLY COMPLETED FISCAL
YEAR OF TENANT, PLUS APPLICABLE YEAR TO DATE REPORTS. All such financial
statements shall be received by Landlord in confidence and shall be used only
for the purposes herein set forth.

ARTICLE 19  QUIET ENJOYMENT

         If Tenant pays the rent and observes and performs the terms, covenants
and conditions contained in this Lease, Tenant shall peaceably and quietly hold
and enjoy the Premises for the Term without hindrance or interruption by,
Landlord, or any other person lawfully claiming by, through or under Landlord
unless otherwise permitted by the terms of this Lease. Tenant acknowledges that
the exercise by the Landlord of any of the rights conferred on Landlord under
this Lease and the entry upon the Premises for or in connection with such
purposes will not be deemed to be a constructive or actual eviction of the
Tenant and will not be considered to be a breach of Landlord's covenant of quiet
enjoyment.

ARTICLE 20        SURRENDER AND HOLDOVER

20.1     Surrender. Upon the expiration or termination of this Lease or of
Tenant's right to possession, Tenant shall surrender the Premises in a clean
undamaged condition, reasonable wear and tear and damage by casualty excepted,
and shall remove all of Tenant's equipment, fixtures and property and repair all
damage caused by the

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<PAGE>   17

removal. Tenant shall not remove permanent improvements that were provided by
Landlord at the commencement of this Lease and shall not remove permanent
improvements later installed by Tenant unless directed to do so by Landlord.

20.2     Holdover. If Tenant holds over without Landlord's consent, Tenant
shall, at Landlord's election, be a tenant at will or a tenant from
month-to-month. In either case rent shall be payable monthly in advance at a
rate equal to 125% of the rate in effect immediately before the holdover began.
A holdover month-to-month tenancy may be terminated by either party as of the
first day of a calendar month upon at least ten days' prior notice. A holdover
tenancy at will is terminable at any time by either party without notice,
regardless of whether rent has been paid in advance. Upon a termination under
this Section, unearned rent shall be refunded following the surrender of
possession provided Tenant is not otherwise in breach of this Lease.

ARTICLE 21  BREACH, DEFAULT, AND REMEDIES

21.1     Default. The following shall constitute "Events of Default":

         (a)      Tenant's failure to pay rent or any other amount due under
this Lease within five days after WRITTEN notice of nonpayment; or

         (b)      Tenant's failure to execute, acknowledge and return a
subordination agreement under Article 17 or an estoppel certificate under
Article 18 within ten days after request where the failure continues for an
additional ten days after notice that it was not received during the initial
ten-day period; or

         (c)      Tenant's failure to perform any other obligation under this
Lease within fifteen days after WRITTEN notice of nonperformance; provided,
however, that if the breach is of such a nature that it cannot be cured within
fifteen days, no Event of Default shall be deemed to have occurred by reason of
the breach if cure is commenced promptly and diligently pursued to completion
within a period not longer than ninety days; and provided further, that in the
event of a breach involving an imminent threat to health or safety, Landlord may
in its notice of breach reduce the period for cure to such shorter period as may
be reasonable under the circumstances; or

         (d)      Tenant vacates, abandons, or otherwise ceases to use the
Premises on a substantial continuing basis except temporary absence excused by
reason of fire, casualty, failure of services or other cause wholly beyond
Tenant's control; for these purposes, absence for SIXTY consecutive business
days shall conclusively be deemed an abandonment.

21.2     Remedies. Upon the occurrence of an Event of Default, Landlord, at any
time thereafter without further notice or demand may exercise any one or more of
the following remedies concurrently or in succession:

         (a)      Terminate Tenant's right to possession of the Premises by
legal process or otherwise, with or without terminating this Lease, and retake
exclusive possession of the Premises.

         (b)      From time to time relet all or portions of the Premises, using
reasonable efforts to mitigate Landlord's damages. In connection with any
reletting, Landlord may relet for a period extending beyond the term of this
Lease and may make alterations or improvements to the Premises without releasing
Tenant of any liability. Upon a reletting of all or substantially all of the
Premises, Landlord shall be entitled to recover all of its then prospective
damages for the balance of the Lease Term measured by the present value of the
difference between amounts payable under this Lease and the anticipated net
proceeds of reletting.

         (c)      From time to time recover accrued and unpaid rent and damages
arising from Tenant's breach of the Lease, regardless of whether the Lease has
been terminated, together with applicable late charges and interest at the rate
of 18% per annum or the highest lawful rate, whichever is less.

         (d)      Enforce the statutory Landlord's lien on Tenant's property.

         (e)      Recover all costs, expenses and attorneys' fees incurred by
Landlord in connection with enforcing this Lease, recovering possession,
reletting the Premises or collecting amounts owed, including, without
limitation, costs of alterations, brokerage commissions, and other costs
incurred in connection with any reletting.

         (f)      Perform the obligation on Tenant's behalf and recover from
Tenant, upon demand, the entire

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<PAGE>   18

amount expended by Landlord plus 10% for special handling, supervision, and
overhead.

         (g)      Pursue other remedies available at law or in equity.

21.3     Subtenancies. Upon a termination of Tenant's right to possession,
whether or not this Lease is terminated: (a) subtenancies and other rights of
persons claiming under or through Tenant shall be terminated or (b) Tenant's
interest in such subleases or other arrangements shall be assigned to Landlord.
Landlord may separately elect termination or assignment with respect to each
such subtenancy or other matter.

21.4     DEFAULT BY LANDLORD. LANDLORD SHALL NOT BE IN DEFAULT UNLESS LANDLORD
FAILS TO PERFORM ITS OBLIGATIONS WITHIN FIFTEEN (15) DAYS AFTER WRITTEN NOTICE
FROM TENANT OF SUCH DEFAULT. IN THE EVENT THE NATURE OF THE ALLEGED DEFAULT IS
SOMETHING THAT REASONABLY REQUIRES MORE THAN FIFTEEN (15) DAYS TO CURE, LANDLORD
SHALL NOT BE DEEMED IN DEFAULT IF IT HAS, WITHIN THE FIFTEEN (15) DAY NOTICE
PERIOD, COMMENCED TO CURE THE DEFAULT AND DILIGENTLY PURSUES THE CURE UNTIL THE
CONDITION CREATING THE DEFAULT IS ABATED OR CORRECTED. IN THE EVENT LANDLORD HAS
NOT CURED THE DEFAULT WITHIN THE TIME ALLOWED, TENANT MAY PURSUE ALL REMEDIES
AVAILABLE AT LAW OR IN EQUITY.

ARTICLE 22  LANDLORD LIABILITY

Notwithstanding anything to the contrary in this Lease, neither Landlord nor
Landlord's directors, officers, shareholders, employees, agents, constituent
partners, beneficiaries, trustees and representatives, successors or assigns
(collectively, "Landlord's Affiliates") shall be personally responsible or
liable for any representation, warranty, covenant, undertaking or agreement
contained in the Lease, and the sole right and remedy of the Tenant or any
subsequent sublessee or assignee shall be against Landlord's interest in the
Project. Neither Tenant nor any subsequent sublessor or assignee shall seek to
obtain any judgment imposing personal liability against Landlord, Landlord's
Affiliates, or their successors or assigns nor execute upon any judgment or
place any lien against any property other than Landlord's interest in the
Project. Landlord shall give written notice to Tenant of any change in ownership
affecting more than 50% of the ownership of Landlord.

ARTICLE 23  NOTICES

Any notice from one party to the other shall be in writing and shall be deemed
duly served: (a) if delivered personally to a corporate officer of Tenant, or if
mailed by registered or certified mail addressed to Tenant at the Premises or
(b) if mailed by registered or certified mail to Landlord at the address set
forth in Section 1.12 or such other address as Landlord may designate. Any
notice to Tenant prior to Tenant's taking possession of the Premises, however,
shall instead be sent to the address set forth in Section 1.11. Any notice shall
be deemed to have been given three days after it was mailed, if mailed, and when
delivered, if personally delivered.

ARTICLE 24  BROKERAGE

TENANT WARRANTS AND REPRESENTS THAT IT HAS DEALT WITH NO BROKER OR OTHER PERSON,
OTHER THAN HORIZON REAL ESTATE GROUP, INC. AND B-H ENTERPRISES OF ARIZONA, INC.
IN CONNECTION WITH THIS LEASE. TENANT SHALL DEFEND, INDEMNIFY AND HOLD LANDLORD
HARMLESS FROM ALL CLAIMS OR LIABILITIES ARISING FROM ANY CLAIM OF COMMISSION
FROM ANY OTHER PARTY CLAIMING THROUGH TENANT. LANDLORD AGREES TO COMPENSATE THE
BROKERS AS CONSIDERATION FOR SERVICES RENDERED IN EXECUTION OF THIS LEASE A FEE
OF 5% OF THE BASE RENT RESERVED HEREUNDER (DIVIDED EQUALLY BETWEEN HORIZON REAL
ESTATE GROUP AND B-H ENTERPRISES) IN TWO EQUAL INSTALLMENTS, FIRST ON THE
EXECUTION HEREOF BY ALL PARTIES, AND SECOND UPON THE FIRST PAYMENT OF BASE RENT
BY TENANT. LANDLORD FURTHER AGREES TO COMPENSATE BROKERS IN THE EVENT THE LEASE
TERM IS RENEWED OR THE PREMISES ARE EXPANDED PURSUANT TO TERMS CONTAINED IN THIS
LEASE. UPON EXPANSION PER THE EXPANSION OPTION, THE BROKERS SHALL BE PAID 5%
(DIVIDED EQUALLY) OF THE BASE RENT DUE FROM THE OCCUPANCY DATE OF THE EXPANDED
PREMISES UNTIL THE DATE WHICH IS FIVE YEARS FROM THE COMMENCEMENT DATE, AND 3%
OF THE BASE, RENT FOR THE BALANCE OF THE INITIAL TERM AS EXTENDED BY THE
EXPANSION OPTION. UPON EXERCISE OF THE TWO YEAR RENEWAL OPTION, THE BROKERS
SHALL BE PAID 5% (DIVIDED EQUALLY) OF THE BASE RENT DUE FOR THE TWO YEAR RENEWAL
TERM. NO BROKERAGE COMPENSATION SHALL BE PAID IN THE EVENT TENANT RENEWS THE
LEASE FOLLOWING EXERCISE OF THE EXPANSION OPTION, NOR FOR ANY EXPANSION
RESULTING FROM TENANT'S EXERCISE OF A RIGHT OF FIRST REFUSAL ON OTHER UNOCCUPIED
SPACE IN THE PROJECT.

                                       15
<PAGE>   19

ARTICLE 25  GENERAL

25.1     Severability. If any term, covenant or condition of this Lease, or the
application thereof, is to any extent held or rendered invalid, it shall be and
is hereby deemed to be independent of the remainder of the Lease and to be
severable and divisible therefrom, and its invalidity, unenforceability or
illegality shall not affect, impair or invalidate the remainder of the Lease or
any part thereof

25.2     No Waiver. The waiver by Landlord, OR BY TENANT, of any breach of any
term, covenant or condition contained in this Lease shall not be deemed to be a
waiver of such term, covenant or condition or of any subsequent breach of the
same or of any other term, covenant or condition contained in this Lease. The
subsequent acceptance of rent by Landlord shall not be deemed to be a waiver of
any preceding breach by Tenant of any term, covenant or condition of this Lease,
regardless of Landlord's knowledge of such preceding breach at the time of
acceptance of rent. No term, covenant or condition of this Lease shall be deemed
to have been Waived by Landlord OR TENANT unless such waiver is in writing by
Landlord OR TENANT.

25.3     Effect of Payment. No payment by Tenant or receipt by the Landlord of a
lesser amount than the monthly payment of rent herein stipulated is deemed to be
other than on account of the earliest stipulated rent, nor is, any endorsement
or statement on any check or any letter accompanying any check or payment of
rent deemed an acknowledgment of full payment or accord and satisfaction, and
Landlord may accept and cash any check or payment without prejudice to
Landlord's right to recover the balance of the rent due and pursue any other
remedy provided in this Lease.

25.4     Delay. If either party is delayed or hindered in or prevented from the
performance of any term, covenant or act required hereunder by reasons of
strikes, labor troubles, inability to procure materials or services, power
failure, restrictive governmental laws or regulations, riots, insurrection,
sabotage, rebellion, war, act of God, or other reason whether of a like nature
or not that is beyond the control of the party affected, financial inability
excepted, then, IF NOTICE IS GIVEN WITHIN TEN (10) DAYS AFTER COMMENCEMENT OF
THE FORCE MAJEURE EVENT, the performance of that term, covenant or act is
excused for the period of the delay and the party delayed shall be entitled to
perform such term, covenant or act within the appropriate time period after the
expiration of the period of such delay. Nothing in this Section, however, shall
excuse Tenant from the prompt payment of any amount payable under this Lease nor
from the consequences of Tenant Delay as provided in Exhibit C (if attached).

25.5     Lender Notice. In the event of a material default by Landlord of a
sufficiently serious nature that Tenant considers the utility of the Premises to
Tenant to be significantly impaired, Tenant shall give written notice of the
default to Landlord and shall simultaneously send a copy of the notice to the
holder of any encumbrance, the name and address of whom has previously been
finished in writing to Tenant.

25.6     No Offer. The submission of this Lease for examination does not
constitute a reservation of an option to lease the Premises, and this Lease
becomes effective as a lease only upon its execution and delivery by Landlord
and Tenant.

25.7     Successors. All rights and liabilities under this Lease extend to and
bind the successors and assigns of Landlord and permitted successors and assigns
of Tenant. No rights, however, shall inure to the benefit of any transferee of
the Tenant unless the transfer has been consented to by the Landlord in writing
as provided in Section 16.1. If there is more than one Tenant, they are all
bound jointly and severally by the terms, covenants and conditions of this
Lease.

25.8     Integration. This Lease and the Exhibits hereto attached, set forth all
the covenants, promises, agreements, conditions and understandings between
Landlord and Tenant concerning the Premises and there are no other covenants,
promises, agreements, conditions or understandings, either oral or written,
between them. No alteration, amendment or addition to this Lease shall be
binding upon Landlord or Tenant unless in writing and signed by Tenant and
Landlord.

25.9     Governing Law. This Lease will be construed in accordance with and
governed by the laws of the State of Arizona.

25.10    Deadlines Enforceable. Time is of the essence of this Lease and of
every part hereof.

25.11    Counterparts. This Lease may be executed in counterparts, which
together shall constitute a single instrument.

                                       16
<PAGE>   20

ARTICLE 26  OPTION TO EXPAND

26. AT ANY TIME DURING THE INITIAL TERM HEREOF, TENANT SHALL HAVE THE OPTION TO
EXPAND ITS PREMISES INTO THE ADJACENT SUITE PRESENTLY OCCUPIED BY PHOENIX
NEWSPAPERS, INC. (THE "EXPANSION OPTION"). UPON RECEIPT OF TENANT'S NOTICE,
LANDLORD SHALL INITIATE THE PROCESS OF RELOCATING PHOENIX NEWSPAPERS, INC. TO
OTHER SPACE. LANDLORD SHALL HAVE ONE YEAR FROM RECEIPT OF TENANT'S NOTICE TO
HAVE PHOENIX NEWSPAPERS VACATE THE SPACE. UPON THE DATE PHOENIX NEWSPAPERS
VACATES, LANDLORD AND TENANT SHALL COMMENCE ALTERATIONS AS REQUIRED FOR TENANT'S
USE OF THE EXPANSION PREMISES. THE PROCESS OF ARCHITECTURAL DESIGN, BIDDING, AND
COMPLETION OF THE WORK SHALL FOLLOW THE SAME PROCESS AS IN EXHIBIT C, EXCEPT
THAT LANDLORD'S COSTS SHALL BE LIMITED TO $25,000. BASE RENT FOR THE EXPANSION
SPACE SHALL BE ADDED TO THE BASE RENT FOR THE (INITIAL) PREMISES AS SET FORTH IN
ARTICLE 1.7 AND SHALL COMMENCE ON THE DATE THE SPACE IS VACATED BY PHOENIX
NEWSPAPERS AND SHALL BE $.68 PER SQUARE FOOT OF EXPANSION SPACE PER MONTH , NET
OF ALL OPERATING COSTS, FROM OCCUPANCY UNTIL APRIL 30, 2000, AND $.75 PER SQUARE
FOOT OF EXPANSION SPACE PER MONTH, NET OF ALL OPERATING COSTS, FROM MAY 1, 2000
TO THE END OF THE INITIAL TERM. IN ORDER TO PREPARE ONE RENTAL CHARGE FOR
TENANT, LANDLORD SHALL CONVERT THE NET RENTAL RATES ($.68 AND $.75) TO RENTAL
RATES DENOMINATED AS PER THE INITIAL TERM BY ADDING THE OPERATING COSTS PER
RENTABLE SQUARE FOOT FROM 1997. THE RESULTING RATES SHALL THEN BE BLENDED WITH
THE BASE RENT FOR THE (INITIAL) PREMISES TO ARRIVE AT THE BASE RENT FOR THE
TOTAL PREMISES OF 64,000+/- SQUARE FEET. BY WAY OF EXAMPLE, IF THE OPERATING
COSTS IN 1997 ARE ASSUMED TO BE $.17 PER SQUARE FOOT, THE BASE RENT OF THE
EXPANDED 64,000+/- SQUARE FEET WOULD INITIALLY BE:

<TABLE>
<CAPTION>

                                                 Base        1997 Oprtg         Gross            Monthly
                                    Sq Ft        Rate           Costs            Rate             Rent
-------------------------------  ------------ -----------  --------------- ---------------- -----------------
<S>                                 <C>           <C>       <C>               <C>               <C>
Initial Premises                    38,712        0.75            NA             0.7500         29,034.00
Expansion Area                      24,757        0.68          0.17             0.8500         21,043.45
                                 ------------ -----------  --------------- ---------------- -----------------
Total Expanded Area                 63,469                                       0.7890         50,077.45
</TABLE>

CONCURRENTLY, TENANT'S PROPORTIONATE SHARE SHALL BE INCREASED TO THE PERCENTAGE
OF TENANT'S TOTAL RENTABLE AREA, DIVIDED BY THE TOTAL RENTABLE AREA OF THE
PROJECT. AS FURTHER CONSIDERATION FOR THE EXPANSION OPTION, THE INITIAL TERM
SHALL BE AUTOMATICALLY EXTENDED SO THAT THE EXPIRATION DATE IS FIVE YEARS FROM
THE DATE TENANT OCCUPIES THE EXPANDED PREMISES. THE EXPANSION OPTION, ONCE
EXERCISED, IS IRREVOCABLE BY TENANT. IF THE ORIGINAL EXPIRATION DATE IS TO OCCUR
PRIOR TO TENANT'S OCCUPANCY OF THE EXPANDED PREMISES, THE TERM SHALL CONTINUE
WITH BASE RENT AND OTHER CHANGES PAYABLE ON THE ORIGINAL 38,712 SQUARE FEET
UNTIL THE EXPANSION SPACE IS VACATED BY PHOENIX NEWSPAPERS, INC.

ARTICLE 27  RIGHT OF FIRST REFUSAL

27. IF DURING THE INITIAL TERM, OR ANY EXTENDED OR RENEWAL TERM HEREOF, ANY
SPACE BECOMES AVAILABLE FOR LEASE WITHIN THE PROJECT, TENANT SHALL ENJOY THE
RIGHT OF FIRST REFUSAL ON THAT SPACE AS FOLLOWS. UPON RECEIPT BY LANDLORD OF A
BONA FIDE OFFER TO LEASE FROM A TENANT, WHICH OFFER LANDLORD ELECTS TO ACCEPT
TENANT SHALL HAVE A PERIOD OF FIVE (5) BUSINESS DAYS FOLLOWING RECEIPT OF
LANDLORD'S NOTICE OF INTENT TO LEASE THE SPACE DURING WHICH TENANT MAY ELECT TO
LEASE THE AFFECTED SPACE ON THE SAME RATE AND TERMS AS OFFERED TO LANDLORD,
EXCEPT THAT TENANT'S LEASE TERM ON ITS CURRENT SPACE AND THE AFFECTED SPACE
SHALL BE EXTENDED TO THE PROSPECTIVE EXPIRATION DATE IN THE OFFER TO LEASE.
LANDLORD'S NOTICE OF INTENT TO LEASE MUST BE IN WRITING, BE SUFFICIENTLY CLEAR
AS TO EXPRESS THE RENTAL RATE, ANY ALTERATIONS TERMS, AND OTHER SALIENT TERMS,
SO THAT TENANT MAY MAKE AN INFORMED DECISION TO EXERCISE ITS RIGHT OF FIRST
REFUSAL. FAILURE OF TENANT TO RESPOND AFFIRMATIVELY EXERCISING ITS RIGHT TO
ENTER INTO THE LEASE OFFERED SHALL BE DEEMED A REJECTION OF THE OFFER. LANDLORD
SHALL THEREUPON BE FREE TO ENTER INTO THE LEASE WITH THE PARTY THAT MADE THE
OFFER ON TERMS NO LESS FAVORABLE THAN OFFERED TO TENANT. IF THE SAID LEASE IS
NOT CONSUMMATED WITHIN 60 DAYS FOLLOWING LANDLORD'S NOTICE, OR IF THE TERMS ARE
MADE MATERIALLY MORE FAVORABLE TO THE INTENDED LESSEE, TENANTS RIGHT OF FIRST
REFUSAL SHALL AGAIN BE EFFECTIVE AS TO THE SPACE IN QUESTION.

ARTICLE 28  REPRESENTATIONS AND WARRANTIES

28. EACH PARTY REPRESENTS AND WARRANTS TO THE OTHER THAT, AS OF THE EXECUTION
HEREOF:

         (a)      AUTHORITY. IT HAS FULL POWER, AUTHORITY AND LEGAL RIGHT TO
EXECUTE THIS LEASE, AND TO LEASE THE PREMISES TO TENANT OR FROM LANDLORD
PURSUANT TO THE TERMS HEREOF AND TO KEEP AND OBSERVE ALL OF THE TERMS OF THIS
LEASE ON ITS PART TO BE PERFORMED.

                                       17
<PAGE>   21

         (b)      LEGAL STATUS AND AUTHORITY. IT (AND EACH ENTITY EXECUTING THE
LEASE AS OR ON BEHALF OF IT) (i) IS DULY ORGANIZED, VALIDLY EXISTING AND IN GOOD
STANDING UNDER THE LAWS OF ITS STATE OF ORGANIZATION OR INCORPORATION; (ii) IS
DULY QUALIFIED TO TRANSACT BUSINESS AND IS IN GOOD STANDING IN THE STATE OF
ARIZONA; AND (iii) HAS ALL NECESSARY APPROVALS, GOVERNMENTAL AND OTHERWISE, AND
FULL POWER AND AUTHORITY TO OWN THE PROJECT (IF LANDLORD) OR LEASE THE PREMISES
(IF TENANT) AND CARRY ON ITS BUSINESS AS NOW CONDUCTED. LANDLORD NOW HAS AND
SHALL CONTINUE TO HAVE THE FULL RIGHT, POWER AND AUTHORITY TO OPERATE AND LEASE
THE PROJECT, AND TO PERFORM ALL OF THE OTHER OBLIGATIONS TO BE PERFORMED BY
LANDLORD UNDER THIS LEASE. TENANT NOW HAS AND SHALL CONTINUE TO HAVE THE FULL
RIGHT, POWER AND AUTHORITY TO LEASE THE PREMISES FROM LANDLORD, AND TO PERFORM
ALL OF THE OTHER OBLIGATIONS TO BE PERFORMED BY TENANT UNDER THIS LEASE.

         (c)      VALIDITY OF DOCUMENTS. THE EXECUTION, DELIVERY AND PERFORMANCE
OF THE LEASE (i) ARE WITHIN ITS POWER; (ii) HAVE BEEN AUTHORIZED BY ALL
REQUISITE PARTNERSHIP, CORPORATE, OR LIMITED LIABILITY COMPANY ACTION (AS THE
CASE MAY BE); (iii) HAVE RECEIVED ALL NECESSARY APPROVALS AND CONSENTS; (iv)
WILL NOT VIOLATE, CONFLICT WITH, RESULT IN A BREACH OF OR CONSTITUTE (WITH
NOTICE OR LAPSE OF TIME, OR BOTH) A DEFAULT UNDER ANY PROVISION OF LAW, ANY
ORDER OR JUDGMENT OF ANY COURT OR GOVERNMENTAL AUTHORITY, THE ARTICLES OF
INCORPORATION, BY-LAWS, OPERATING AGREEMENT OR OTHER GOVERNING INSTRUMENT OF IT,
OR ANY INDENTURE, AGREEMENT, OR OTHER INSTRUMENT TO WHICH IT (AND EACH ENTITY
EXECUTING THE LEASE AS OR ON BEHALF OF LANDLORD OR TENANT) IS A PARTY OR BY
WHICH THE PROJECT MAY BE BOUND OR AFFECTED.

         (d)      LITIGATION. THERE IS NO ACTION, SUIT, OR PROCEEDINGS,
JUDICIAL, ADMINISTRATIVE OR OTHERWISE (INCLUDING ANY CONDEMNATION OR SIMILAR
PROCEEDINGS) OF A MATERIAL NATURE, PENDING OR, TO THE BEST OF THE PARTY'S
KNOWLEDGE, THREATENED OR CONTEMPLATED AGAINST, OR AFFECTING IT, OR THE PROJECT
THAT MIGHT ADVERSELY AFFECT THE OTHER PARTY'S INTEREST IN THE PREMISES OR THE
RIGHTS OF THE OTHER PARTY UNDER THE LEASE.

         (e)      STATUS OF PROPERTY. TO THE BEST OF LANDLORD'S KNOWLEDGE
HEREOF: (i) LANDLORD HAS OBTAINED ALL NECESSARY CERTIFICATES, LICENSES AND OTHER
APPROVALS, GOVERNMENTAL AND OTHERWISE, NECESSARY FOR THE OPERATION OF THE
PROJECT AND THE CONDUCT OF ITS BUSINESS, AND ALL REQUIRED ZONING, BUILDING CODE,
LAND USE, ENVIRONMENTAL AND OTHER SIMILAR PERMITS OR APPROVALS, ALL OF WHICH ARE
IN FULL FORCE AND EFFECT AS OF THE DATE HEREOF AND NOT SUBJECT TO REVOCATION,
SUSPENSION, FORFEITURE OR MODIFICATION. (ii) THE PROJECT AND THE PRESENT AND
CONTEMPLATED USES AND OCCUPANCY THEREOF ARE IN FULL COMPLIANCE WITH ALL
APPLICABLE LAWS, INCLUDING, WITHOUT LIMITATION, ZONING ORDINANCES, BUILDING
CODES, LAND USE AND ENVIRONMENTAL LAWS, LAWS RELATED TO THE DISABLED (INCLUDING,
BUT NOT LIMITED TO, THE ADA) AND OTHER SIMILAR LAWS. (iii) THE PROJECT IS SERVED
BY ALL UTILITIES REQUIRED FOR THE CURRENT OR CONTEMPLATED USE THEREOF, WITH THE
EXCEPTION OF NATURAL GAS. ALL UTILITY SERVICE IS PROVIDED BY PUBLIC UTILITIES
AND THE PROJECT HAS ACCEPTED OR IS EQUIPPED TO ACCEPT SUCH UTILITY SERVICE. (iv)
ALL PUBLIC ROADS AND STREETS NECESSARY FOR SERVICE OF AND ACCESS TO THE PROJECT
FOR THE CURRENT OR CONTEMPLATED USE THEREOF HAVE BEEN COMPLETED, ARE SERVICEABLE
AND ALL-WEATHER AND ARE PHYSICALLY AND LEGALLY OPEN FOR USE BY THE PUBLIC. (v)
THE PROJECT IS SERVED BY PUBLIC WATER AND SEWER SYSTEMS. (vi) THE PROJECT IS
FREE FROM DAMAGE CAUSED BY FIRE OR OTHER CASUALTY. (vii) ALL COSTS AND EXPENSES
OF ANY AND ALL LABOR, MATERIALS, SUPPLIES AND EQUIPMENT USED IN THE CONSTRUCTION
OF THE PROJECT HAVE BEEN PAID IN FULL. (viii) ALL LIQUID AND SOLID WASTE
DISPOSAL, SEPTIC AND SEWER SYSTEMS LOCATED ON THE PROJECT ARE IN A GOOD AND SAFE
CONDITION AND REPAIR AND IN COMPLIANCE WITH ALL APPLICABLE LAWS.

         (f)      FINANCIAL CONDITION. IT (AND EACH ENTITY EXECUTING THIS LEASE
AS OR ON BEHALF OF IT) IS SOLVENT, AND NO BANKRUPTCY, REORGANIZATION, INSOLVENCY
OR SIMILAR PROCEEDING UNDER ANY FEDERAL OR STATE LAW WITH RESPECT TO IT (AND
EACH ENTITY EXECUTING THIS LEASE AS OR ON BEHALF OF IT) HAS BEEN INITIATED.

         (g)      TITLE. LANDLORD WARRANTS TO TENANT THAT LANDLORD HAS GOOD AND
MARKETABLE TITLE TO THE PROJECT AND HAS THE FULL POWER, AUTHORITY AND RIGHT TO
EXECUTE, DELIVER AND PERFORM ITS OBLIGATIONS UNDER THIS LEASE AND TO LEASE THE
PREMISES TO TENANT AND THAT LANDLORD OWNS THE PROJECT FREE AND CLEAR OF ALL
LIENS, ENCUMBRANCES AND CHARGES WHATSOEVER EXCEPT FOR CURRENT PROPERTY TAXES,
PROPERTY OWNER ASSOCIATION ASSESSMENTS, AND CHARGES FOR LABOR, MATERIALS AND
SERVICES BEING FURNISHED TO THE PROJECT BY LANDLORD'S VENDORS AND CONTRACTORS.

                                       18
<PAGE>   22

In Witness Whereof, the parties have entered into this lease as of the day and
year first above written.

LANDLORD:                                        TENANT:

MONAGHAN COMPANY, LLC                            ELECTRONICS ACCESSORY
an Arizona limited liability company             SPECIALISTS INTERNATIONAL, INC.
                                                 a Delaware corporation

By  /s/ J. MONAGHAN                              By  /s/ MONTE HALL
    ---------------------------------                ---------------------------
Its                                              Its Controller
    ---------------------------------                ---------------------------

COLONIAL TRUST COMPANY, an Arizona
corporation, as successor Trustee under the
Monaghan Irrevocable Children's Trust created
December 17, 1983.

By: /s/ A. ROLSON
    -------------------------------
Its:   VP
    -------------------------------

                                       19

<PAGE>   23

                                    EXHIBIT A

                                  THE PREMISES

                                  [Floor Plan]

                                       20
<PAGE>   24

                                    EXHIBIT B

                                   THE PROJECT

                                [Site Plan Map]

                                       21

<PAGE>   25

                                    EXHIBIT C

                             CONSTRUCTION PROVISIONS

1.       Space Plan. Attached to this Lease as Exhibit C-1 is a preliminary
space plan prepared by Architecture Plus (Job No.________, dated
_______________) approved by Landlord and Tenant showing the size, nature and
location of the improvements to be constructed in the Premises (the
"Improvements"). Promptly following execution of this Lease, Tenant shall meet
with Landlord's architect and shall provide such information and make such
selections as may be necessary for the expeditious completion of the planning
process. Exhibit C-1 expresses all of the demolition, alterations, and
improvements to be performed by Landlord ("Landlord's Work").

2.       Working Drawings. Landlord's Work shall not be commenced unless and
until working drawings prepared by Architecture Plus are completed and approved
in writing by Tenant.

3.       Cooperation. During the entire course of the process described above,
both Landlord and Tenant shall review and respond to submissions by the other
party with reasonable dispatch. Tenant shall respond with its approval or
comments within three days after receipt of initial drawings, specifications, or
other materials requiring Tenant's review and within three days after receipt of
revised versions of such documents or materials. From time to time at the
request of either party Landlord and Tenant shall devise, and revise as
necessary, working schedules for construction of the Improvements. Tenant shall
not permit any supplier, installer, contractor, or other person employed by
Tenant to interfere in any way with the progress of the work. Access by Tenant's
suppliers, contractors and installers shall be subject to (i) scheduling by
Landlord upon at least ten days' prior notice by Tenant, and (ii) compliance
with all requirements imposed by Landlord with respect to insurance,
cooperation, permits, licenses, bonding, hours of work, safety and use of
flammable substances.

4.       Cost. The working drawings shall be put out to bid to at least three
contractors of Landlord's choosing. Landlord shall inform Tenant of all bids and
shall choose the contractor for award of the job after consultation with Tenant.
To the extent the bid price, together with architectural fees, building permit
and plan check fees, and any related out of pocket costs to Landlord for the
Work exceeds $50,000, Tenant shall advance to Landlord payment of the excess, if
any, prior to commencement of the Work. In the event of change orders during the
completion of the Work, Tenant shall pay to Landlord the amount of additive
change orders above the $50,000 threshold, and Landlord shall refund to Tenant
from such advances the amount of any price reduction change orders.

5.       Punchlist. Within ten days after substantial completion of Landlord's
Work, Tenant shall deliver to Landlord a written punchlist specifying all
defects in materials or workmanship in the Improvements. Any defects not
specified in the punchlist, except latent defects not readily discoverable by
inspection, are waived. Landlord shall promptly cause all matters appearing on
the punchlist to be corrected.

6.       Delay. If completion of construction of Improvements within the
Premises is delayed by Tenant Delay, then the Commencement Date shall be deemed
to have occurred and rent shall begin to accrue as of the date when they would
have done so but for the Tenant Delay. "Tenant Delay" means delay as a result
of: (a) Tenant's failure to meet with the architect and to provide all required
information and make necessary selections for the expeditious development of
Plans; (b) Tenant's failure to provide comments on proposed Plans in a timely
manner; (c) Tenant's request for materials, finishes or installations requiring
more time to obtain, construct or install than Landlord's standard; or (d)
Tenant's change in any Plans after the revisions to the initial draft; or, (e)
performance or completion by a party employed by Tenant. Landlord shall not be
liable for any direct or consequential damages resulting from delayed delivery
of the Premises by reason of delayed construction or otherwise.

7.       Existing Equipment and Devices. Landlord shall be responsible, at its
sole cost and expense, for repairing or replacing, as necessary, all connected
electrical devices, heating, ventilation and air conditioning devices, plumbing
fixtures, light fixtures, fire sprinklers and related life safety devices, and
electrical devices prior to the Commencement Date, and shall warrant such
devices for a period of 90 days following the Commencement Date. Landlord makes
no warranty as to the adequacy or suitability of such devices for Tenant's use
and occupancy; only that such devices shall be in good working order for the
period of the 90 day warranty. Landlord makes no warranty, and is under no
obligation to service any existing security alarm, telephone wiring or devices
beyond the US West IMPOP, or pneumatic systems.

                                       22
<PAGE>   26

                                    EXHIBIT D
                              RULES AND REGULATIONS

1.       Tenant shall not obstruct any driveways, parking areas, or sidewalks.

2.       Landlord shall not in any way be responsible to any Tenant for any loss
of property on the Premises, however occurring, or for any damage to any
Tenant's property.

3.       Landlord will furnish Tenant free of charge with two keys to each door
in the Premises, AND SHALL HAVE RE-KEYED ALL EXTERIOR/ENTRY DOORS. LANDLORD MAY
MAKE A REASONABLE CHARGE FOR ANY ADDITIONAL KEYS OBTAINED THROUGH LANDLORD.
TENANT SHALL NOT ALTER ANY EXTERIOR LOCK OR INSTALL A NEW OR ADDITIONAL LOCK OR
BOLT ON ANY ENTRY DOOR OF ITS PREMISES WITHOUT PRIOR APPROVAL OF LANDLORD AND
WITHOUT PROVIDING LANDLORD AND THE FIRE DEPARTMENT WITH KEYS. Tenant, upon the
termination of its tenancy, shall deliver to Landlord the keys of all doors
which have been furnished to Tenant, and in the event of loss of any keys so
furnished, shall pay Landlord therefor.

4.       Tenant shall not place a load upon any floor which exceeds the load per
square foot which such floor was designed to carry and which is allowed by law.
Landlord shall have the right to prescribe the weight, size and position to all
equipment, materials, furniture or other property brought into the Building.
Heavy objects shall, stand on such platforms as determined by Landlord to be
necessary to properly distribute the weight. Business machines and mechanical
equipment belonging to Tenant which cause noise or vibration that may be
transmitted to the structure of the Building or to any space in the Building to
such a degree as to be objectionable to Landlord or to any tenants shall be
placed and maintained by Tenant, at Tenant's expense, on vibration eliminators
or other devices sufficient to eliminate excessive noise or vibration. The
persons employed to move such equipment in or out of the Building must be
acceptable to Landlord. Landlord will not be responsible for loss of, or damage
to, any such equipment or other property from any cause, and all damage done to
the Building by maintaining or moving such equipment or other property shall be
repaired at the expense of Tenant.

5.       Tenant shall close and lock the doors of its Premises and entirely shut
off all water faucets or other water apparatus and electricity, gas or air
outlets before Tenant and its employees leave the Premises. Tenant shall be
responsible for any damage or injuries sustained by other tenants or occupants
of the Building or by Landlord for noncompliance with this rule.

6.       Tenant shall not interfere with radio or television broadcasting or
reception from or in the Building or elsewhere.

7.       Except as approved by Landlord, Tenant shall not mark, drive nails,
screw or drill into the partitions, woodwork or plaster or in any way deface the
Premises. PLACEMENT OF NAILS AND PICTURE BOOKS FOR DISPLAY OF ARTWORK IS HEREBY
APPROVED. Tenant shall not cut or, bore holes for wires. Tenant shall not affix
any floor covering to the floor of the Premises in any manner except as approved
by Landlord. Tenant shall repair any damage resulting from noncompliance with
this rule.

8.       No cooking shall be done or permitted by any Tenant on the Premises,
except by the Tenant of Underwriters' Laboratory approved microwave oven or
equipment for brewing coffee, tea, hot chocolate and similar beverages shall be
permitted provided that such equipment and use is in accordance with all
applicable federal, state and city laws, codes, ordinances, rules and
regulations.

9.       Landlord may waive any one or more of these Rules and Regulations for
the benefit of any particular tenant or tenants, but no such waiver by Landlord
shall be construed as a waiver of such Rules and Regulations in favor of any
other tenant or tenants, nor prevent Landlord from thereafter enforcing any such
Rules and Regulations against any or all of the tenants of the Building.

10.      These Rules and Regulations are in addition to, and shall not be
construed to in any way modify or amend, in whole or in part, the terms,
covenants, agreements and conditions of any lease of premises in the Building.

11.      Landlord reserves the right to make such other and reasonable rules and
regulations as in its judgment may from time to time be needed for safety and
security, for care and cleanliness of the Building and for the preservation of
good order in and about the Building. Tenant agrees to abide by all such rules
and regulations in this Exhibit D stated and any additional rules and
regulations which are adopted.

12.      Tenant shall be responsible for the observance of all of the foregoing
rules by Tenant's employees, agents, clients, customers, invitees and guests.

                                       23

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