Document:

<PAGE>   1
                                                                     EXHIBIT 4.4

                                UNIT CERTIFICATE

U-_____                                                           _________Units
                             TASER INTERNATIONAL, INC.
               ORGANIZED UNDER THE LAWS OF THE STATE OF DELAWARE

                EACH UNIT CONSISTING OF ONE AND ONE-HALF SHARES
                       OF COMMON STOCK, PAR VALUE $0.00001
          PER SHARE, AND ONE AND ONE-HALF WARRANTS, EACH WHOLE WARRANT
                     TO PURCHASE ONE SHARE OF COMMON STOCK
                                CUSIP 87651B 20 3

         THIS CERTIFIES THAT

or registered assigns (the "Registered Holder") is the owner of the number of
Units specified above, each of which consists of one and one-half shares of
common stock (the "Common Stock"), par value $0.00001 per share, of TASER
International, Inc. (the "Company") and one and one-half warrants, each whole
warrant to purchase one share of Common Stock (the "Warrant"). On or prior to
the Separation Time (as defined herein), the securities evidenced by this
certificate may be combined, exchanged or transferred only as Units, and the
Common Stock and Warrants evidenced by this Certificate may not be split up,
exchanged or traded separately. The Units may separate into shares of Common
Stock and Warrants as of the close of business on ______________________, 2001
[thirty days after the consummation of the initial public offering of Units], or
at any time after that date, in the discretion of Paulson Investment Company,
Inc. (the "Separation Time"). The shares of Common Stock and Warrants comprising
the Units shall be separately tradeable commencing on the first day after the
Separation Time on which The Nasdaq SmallCap Market is open for trading. The
Warrants comprising part of the Units are issued under and pursuant to a certain
Warrant and Unit Agreement dated as of ______________, 2001 (the "Warrant
Agreement"), between the Company and US Stock Transfer Corporation, as Transfer
Agent (the "Transfer Agent"), and are subject to the terms and provisions
contained therein and on the face of the certificates covered thereby, to all of
which terms and provisions the holder of this Unit Certificate consents by
acceptance hereof. The Warrant Agreement provides for adjustment in the number
of shares of Common Stock to be delivered upon the exercise of Warrants
evidenced hereby and to the exercise price of such Warrants in certain events
therein set forth. Subject to the foregoing, the number of Warrants and the
number of shares of Common Stock comprising the Units are equal.

         Copies of the Warrant Agreement are available for inspection at the
stock transfer office of the Transfer Agent and Registrar or may be obtained
upon written request addressed to TASER International, Inc. at 7860 E. McClain
Drive, Suite 2, Scottsdale, Arizona 85260, Attention: Chief Financial Officer.

         This Unit Certificate is not valid unless countersigned by the Transfer
Agent and Registrar of the Company.

         IN WITNESS WHEREOF, TASER International, Inc. has caused this Unit
Certificate to be duly executed manually or in facsimile by two of its officers
thereunto duly authorized.

Dated:_____________________________

                                          TASER INTERNATIONAL, INC.

<PAGE>   2
                                          By: ________________________________
                                                  President

                                          Attest: ______________________________
                                                  Secretary

Countersigned

US Stock Transfer Corporation
1745 Gardena Avenue
Glendale, California 91204

By: ________________________________
     Authorized Signature

                             TASER INTERNATIONAL, INC.

         The Registered Holder hereby is entitled, at any time after the
Separation Time (as defined on the face hereof) to exchange the Units
represented by this Unit Certificate for Common Stock Certificate(s)
representing one and one-half shares of Common Stock, for each Unit represented
by this Unit Certificate, and Warrant Certificate(s) representing one and
one-half Warrants, for each unit represented by this Unit Certificate, and cash
in place of any fractional shares of Common Stock or fractional Warrants to
which the Registered Holder would otherwise be entitled, upon surrender of this
Unit Certificate to the Transfer Agent and Registrar together with any
documentation required by such agent.

         REFERENCE IS MADE TO THE WARRANT AGREEMENT REFERRED TO ON THE FACE
HEREOF, AND THE PROVISIONS OF SUCH WARRANT AGREEMENT SHALL FOR ALL PURPOSES HAVE
THE SAME EFFECT AS THOUGH FULLY SET FORTH ON THE FACE OF THIS CERTIFICATE.
COPIES OF THE WARRANT AGREEMENT MAY BE OBTAINED UPON WRITTEN REQUEST FROM THE
TRANSFER AGENT AND REGISTRAR, US STOCK TRANSFER CORPORATION.

         The following abbreviations, when used in the inscription on the face
of this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations.

                    TEN COM   -    as tenants in common
                    TEN ENT   -    as tenants by the entireties
                    JT TEN    -    as joint tenants with rights of survivorship
                                   and not as tenants in common
                    COM PROP  -    as community property

UNIF GIFT MIN ACT             -       _________________Custodian________________
                                            (Cust)                  (minor)
                                      under Uniform Gifts to Minors Act

                                      __________________________________________
                                                     (State)

UNIF TRF MIN ACT              -       _________________Custodian________________
                                            (Cust)                  (minor)
                                      under Uniform Gifts to Minors Act
<PAGE>   3

                                      __________________________________________
                                                     (State)

                               FORM OF ASSIGNMENT
                       (TO BE SIGNED ONLY UPON ASSIGNMENT)

FOR VALUE RECEIVED, the undersigned Registered Holder (                 )

________________________
(Please  insert  social  security or other  identification  number of Registered
Holder)

hereby sells, assigns and transfers unto

________________________________________________________________________________
________________________________________________________________________________
________________________________________________________________________________
               (Please Print Name and Address including Zip Code)

Units evidenced by the within Unit Certificate, and irrevocably constitutes and
appoints
______________________________________________________________________attorney
to transfer this Unit Certificate on the books of TASER International, Inc. with
the full power of substitution in the premises.

Dated:__________________, ________

Signature:

__________________________________

(Signature must conform in all respects to the name of Registered Holder as
specified on the face of this Unit Certificate in every particular, without
alteration or any change whatsoever, and the signature must be guaranteed in the
usual manner.)

Signatures Guaranteed:

__________________________________

The signatures should be guaranteed by an eligible institution (banks,
stockbrokers, savings and loan association and credit unions with membership in
an approved signature medallion program), pursuant to S.E.C. Rule 17Ad-15.<PAGE>   1
                                                                     Exhibit 4.5

                           WARRANT AND UNIT AGREEMENT

TASER International, Inc., 7860 E. McClain Drive, Suite 2, Scottsdale, Arizona
85260, a Delaware corporation ("Company"), and US Stock Transfer Corporation,
1745 Gardena Avenue, Glendale, California, a _________ corporation ("Transfer
Agent"), agree as follows:

1. PURPOSE. The Company proposes to publicly offer and issue in an initial
public offering (the "Offering") ____________ units ("Units"). Each Unit will
entitle the registered holder of a Unit ("Unit Holder") to (i) one and one-half
(1.5) shares of the Company's $0.00001 par value common stock ("Share") and (ii)
one and one-half (1.5) warrants, each whole warrant permitting the purchase of
one (1) Share ("Warrant").

2. WARRANTS. Each Warrant will entitle the registered holder of a Warrant
("Warrant Holder") to purchase from the Company one (1) Share at one hundred ten
percent (110%) of two-thirds of the Initial Public Offering price of the Units
(the "Exercise Price"). A Warrant Holder may exercise all or any number of
Warrants resulting in the purchase of a whole number of Shares.

3. EXERCISE PERIOD. The Warrants may be exercised at any time during the period
commencing thirty (30) days after the effective date ("Offering Date") of the
Offering ("Exercise Date") and ending at the close of business on the
fifth (5th) anniversary date of the closing of the Offering ("Expiration Date"),
except as changed by Section 15 of this Agreement.

4. NON-DETACHABILITY. A Warrant Certificate (as defined below) may not be
detached from a Share certificate contained in a Unit for at least thirty (30)
days following the Offering Date. Until such time, a Warrant Certificate may be
split up, combined, exchanged or transferred on the books of the Transfer Agent
only together with a Share certificate. Paulson Investment Company, Inc. will
then determine when the Units separate, after which the Shares and Warrants will
trade separately.

5. CERTIFICATES. The Warrant certificates shall be in registered form only and
shall be substantially in the form set forth in Exhibit A attached to this
Agreement ("Warrant Certificate"). The Unit certificates shall be in registered
form only and shall be substantially in the form set forth in Exhibit B attached
to this Agreement ("Unit Certificate"). Warrant and Unit Certificates shall be
signed by, or shall bear the facsimile signature of, the Chief Executive
Officer, President or a Vice President of the Company and the Secretary or an
Assistant Secretary of the Company. If any person, whose facsimile signature has
been placed upon any Warrant or Unit Certificate or the signature of an officer
of the Company, shall have ceased to be such officer before such Warrant or Unit
Certificate is countersigned, issued and delivered, such Warrant or Unit
Certificate shall be countersigned, issued and delivered with the same effect as
if such person had not ceased to be such officer. Any Warrant or Unit
Certificate may be signed by, or made to bear the facsimile signature of, any
person who at the actual date of the preparation of such Warrant or Unit
Certificate shall be a proper officer of the Company to sign such Warrant or
Unit Certificate, even though such person was not such an officer upon the date
of this Agreement.
<PAGE>   2
6. ISSUANCE OF NEW CERTIFICATES. Notwithstanding any of the provisions of this
Agreement or the several Warrant or Unit Certificates to the contrary, the
Company may, at its option, issue new Warrant or Unit Certificates in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the Exercise Price or the number or kind of shares purchasable under the
several Warrant or Unit Certificates made in accordance with the provisions of
this Agreement.

7. COUNTERSIGNING. Warrant and Unit Certificates shall be manually countersigned
by the Transfer Agent and shall not be valid for any purpose unless so
countersigned. The Transfer Agent hereby is authorized to countersign and
deliver to, or in accordance with the instructions of, any Warrant or Unit
Holder any Warrant or Unit Certificate, respectively, which is properly issued.

8. REGISTRATION OF TRANSFER AND EXCHANGES. The Transfer Agent will keep or cause
to be kept books for registration of ownership or transfer of Warrant and Unit
Certificates issued hereunder. Such registers shall show the names and addresses
of the respective holders of the Warrant and Unit Certificates and the number of
Warrants and Units evidenced by each such Warrant or Unit Certificate. Subject
to the provisions of Section 4, the Transfer Agent shall from time to time
register the transfer of any outstanding Warrant or Unit Certificate upon
records maintained by the Transfer Agent for such purpose upon surrender of such
Warrant or Unit Certificate to the Transfer Agent for transfer, accompanied by
appropriate instruments of transfer in form satisfactory to the Company and the
Transfer Agent and duly executed by the Warrant or Unit Holder or a duly
authorized attorney. Upon any such registration of transfer, a new Warrant or
Unit Certificate shall be issued in the name of and to the transferee and the
surrendered Warrant or Unit Certificate shall be cancelled.

9. EXERCISE OF WARRANTS.

         a. Any one Warrant or any multiple of one Warrant evidenced by any
Warrant Certificate may be exercised on or after the Exercise Date and on or
before the Expiration Date. A Warrant shall be exercised by the Warrant Holder
by surrendering to the Transfer Agent the Warrant Certificate evidencing such
Warrant with the exercise form on the reverse of such Warrant Certificate duly
completed and executed and delivering to the Transfer Agent, by good check or
bank draft payable to the order of the Company, the Exercise Price for each
Share to be purchased. No fractional warrant may be exercised, but will be
redeemed for cash equal to the current market value of such fractional warrant,
as defined in Section 19 of this Warrant and Unit Agreement.

         b. Upon receipt of a Warrant Certificate with the exercise form thereon
duly executed together with payment in full of the Exercise Price (and an amount
equal to any applicable taxes or government charges) for the Shares for which
Warrants are then being exercised, the Transfer Agent shall requisition from any
transfer agent for the Shares, and upon receipt shall make delivery of,
certificates evidencing the total number of whole Shares for which Warrants are
then being exercised in such names and denominations as are required for
delivery to, or in accordance with the instructions of, the Warrant Holder. Such
certificates for the Shares shall be deemed to be issued, and the person to whom
such Shares are issued of record shall be deemed to have become a holder of
record of such Shares, as of the date of the surrender of such Warrant
Certificate and payment of the Exercise Price (and an amount equal to any
applicable taxes or government
<PAGE>   3
charges), whichever shall last occur, provided that if the books of the Company
with respect to the Shares shall be deemed to be closed, the person to whom such
Shares are issued of record shall be deemed to have become a record holder of
such Shares as of the date on which such books shall next be open (whether
before, on or after the Expiration Date). The Company covenants and agrees that
it shall not cause its stock transfer books to be closed for a period of more
than twenty (20) consecutive business days except upon consolidation, merger,
sale of all of its assets, dissolution or liquidation or as otherwise provided
by law.

         c. In addition, if it is required by law and upon instruction by the
Company, the Transfer Agent will deliver to each Warrant Holder a prospectus
that complies with the provisions of Section 5 of the Securities Act, as
amended, and the Company agrees to supply the Transfer Agent with a sufficient
number of prospectuses to effectuate that purpose.

         d. Any Warrant Certificate or Certificates may be exchanged at the
option of the holder thereof for another Warrant Certificate or Certificates of
different denominations, of like tenor and representing in the aggregate the
same number of Warrants, upon surrender of such Warrant Certificate or
Certificates, with the Form of Assignment duly filled in and executed, to the
Transfer Agent, at any time or from time-to-time after the close of business on
the date hereof and prior to the close of business on the Expiration Date. The
Transfer Agent shall promptly cancel the surrendered Warrant Certificate or
Certificates and deliver the new Warrant Certificate or Certificates pursuant to
the provisions of this Section.

         e. If less than all the Warrants evidenced by a Warrant Certificate are
exercised upon a single occasion, a new Warrant Certificate for the balance of
the Warrants not so exercised shall be issued and delivered to, or in accordance
with, transfer instructions properly given by the Warrant Holder until the
Expiration Date.

         f. All Warrant Certificates surrendered upon exercise of the Warrants
shall be cancelled.

         g. Upon the exercise, or conversion of any Warrant, the Transfer Agent
shall account promptly to the Company with respect to Warrants exercised and
concurrently pay to the Company all moneys received by the Transfer Agent for
the purchase of securities or other property through the exercise of such
Warrants.

         h. Expenses incurred by the Transfer Agent while acting in the capacity
as Transfer Agent, in accordance with this Agreement, will be paid by the
Company. A detailed accounting statement relating to the number of shares
exercised, names of registered Warrant Holder(s) and the net amount of exercise
funds remitted will be given to the Company with the payment of each exercise
amount.

10. REDEMPTION. Upon 30 days notice, the Company may redeem any or all
outstanding and unexercised Warrants at any time if the basic net income per
Share of Common Stock as confirmed by an audit conducted in accordance with
generally accepted accounting principles applicable in the United States (which
such audit may be conducted with respect to any fiscal year of the Company or
any 12-month period ending on the last day of a fiscal quarter of the Company,
in the Company's sole discretion), is equal or greater than $1.00, at a price of
$0.25 per Warrant.

<PAGE>   4
         Notice of redemption of Warrants shall be given at least thirty (30)
days prior to the Redemption Date by mailing, by registered or certified mail,
return receipt requested, a copy of such notice to the Transfer Agent and by
first class mail to all of the holders of record of Warrants at their respective
addresses appearing on the books or transfer records of the Company or such
other address designated in writing by the holder of record to the Transfer
Agent not less than forty (40) days prior to the Redemption Date.
<PAGE>   5
11. TAXES. The Company will pay all taxes attributable to the initial issuance
of Shares upon exercise of Warrants. The Company shall not, however, be required
to pay any tax which may be payable in respect of any transfer involved in any
issue of Warrant or Unit Certificates or in the issue of any certificates of
Shares in the name other than that of the Warrant or Unit Holder upon the
exercise of any Warrant or Unit, as the case may be.

12. MUTILATED OR MISSING CERTIFICATES. If any Warrant or Unit Certificate is
mutilated, lost, stolen or destroyed, the Company and the Transfer Agent may, on
such terms as to indemnity or otherwise as they may in their discretion impose
(which shall, in the case of a mutilated Warrant or Unit Certificate, include
the surrender thereof), and upon receipt of evidence satisfactory to the Company
and the Transfer Agent of such mutilation, loss, theft or destruction, issue a
substitute Warrant or Unit Certificate, respectively, of like denomination or
tenor as the Warrant or Unit Certificate so mutilated, lost, stolen or
destroyed. Applicants for substitute Warrant or Unit Certificates shall comply
with such other reasonable regulations and pay any reasonable charges as the
Company or the Transfer Agent may prescribe.

13. SUBSEQUENT ISSUE OF CERTIFICATES. Subsequent to their original issuance, no
Warrant or Unit Certificates shall be reissued except (i) such Certificates
issued upon transfer thereof in accordance with Section 8 hereof, (ii) such
Certificates issued upon any combination, split-up or exchange of Warrant or
Unit Certificates pursuant to Section 8 hereof, (iii) such Certificates issued
in replacement of mutilated, destroyed, lost or stolen Warrant or Unit
Certificates pursuant to Section 12 hereof, (iv) Warrant Certificates issued
upon the partial exercise of Warrant Certificates pursuant to Section 9 hereof,
and (v) Warrant Certificates issued to reflect any adjustment or change in the
Exercise Price or the number or kind of shares purchasable thereunder pursuant
to Section 6 hereof. The Transfer Agent is hereby irrevocably authorized to
countersign and deliver, in accordance with the provisions of said Sections 6,
8, 9 and 12, the new Warrant or Unit Certificates, as the case may be, required
for purposes thereof, and the Company, whenever required by the Transfer Agent,
will supply the Transfer Agent with Warrant and Unit Certificates duly executed
on behalf of the Company for such purposes.

14. RESERVATION OF SHARES. For the purpose of enabling the Company to satisfy
all obligations to issue Shares upon exercise of Warrants, the Company will at
all times reserve and keep available free from preemptive rights, out of the
aggregate of its authorized but unissued shares, the full number of Shares which
may be issued upon the exercise of the Warrants. The Company covenants all
shares which shall be so issuable, will upon issue be fully paid and
nonassessable by the Company and free from all taxes, liens, charges and
security interests with respect to the issue thereof. In the case of a Warrant
exercisable solely for securities listed on a securities exchange or for which
there are at least two (2) independent market makers, the Company may elect to
redeem Warrants submitted to the Transfer Agent for exercise for a price equal
to the difference between the aggregate low asked price, or closing price, as
the case may be, of the securities for which such Warrant is exercisable on the
date of such submission and the Exercise Price of such Warrants; in the event of
such redemption, the Company will pay to the holder of such Warrants the
above-described redemption price in cash within ten (10) business days after
receipt of notice from the Transfer Agent that such Warrants have been submitted
for exercise.
<PAGE>   6
15. GOVERNMENTAL RESTRICTIONS. If any Shares issuable upon the exercise of
Warrants require registration or approval of any governmental authority, the
Company will use commercially reasonable efforts to secure such registration or
approval and, to the extent practicable, take action in anticipation of and
prior to the exercise of the Warrants necessary to permit a public offering of
the securities underlying the Warrants during the term of this Agreement;
provided that in no event shall such Shares be issued, and the Company shall
have the authority to suspend the exercise of all Warrants, until such
registration or approval shall have been obtained; but all Warrants, the
exercise of which is requested during any such suspension, shall be exercisable
at the Exercise Price. If any such period of suspension continues past the
Expiration Date, all Warrants, the exercise of which have been requested on or
prior to the Expiration Date, shall be exercisable upon the removal of such
suspension until the close of business on the business day immediately following
the expiration of such suspension.

16. ADJUSTMENTS OF NUMBER AND KIND OF SHARES PURCHASABLE AND EXERCISE PRICE. The
number and kind of securities or other property purchasable upon exercise of a
Warrant shall be subject to adjustment from time to time upon the occurrence,
after the date hereof, of any of the following events:

         a. In case the Company shall (i) pay a dividend in, or make a
distribution of, shares of capital stock on its outstanding Common Stock, (ii)
subdivide its outstanding shares of Common Stock into a greater number of such
shares or (iii) combine its outstanding shares of Common Stock into a smaller
number of such shares, the total number of shares of Common Stock purchasable
upon the exercise of each Warrant outstanding immediately prior thereto shall be
adjusted so that the holder of any Warrant Certificate thereafter surrendered
for exercise shall be entitled to receive at the same aggregate Exercise Price
the number of shares of capital stock (of one or more classes) which such holder
would have owned or have been entitled to receive immediately following the
happening of any of the events described above had such Warrant been exercised
in full immediately prior to the record date with respect to such event. Any
adjustment made pursuant to this subsection shall, in the case of a stock
dividend or distribution, become effective as of the record date therefor and,
in the case of a subdivision or combination, be made as of the effective date
thereof. If, as a result of an adjustment made pursuant to this subsection, the
holder of any Warrant Certificate thereafter surrendered for exercise shall
become entitled to receive shares of two or more classes of capital stock of the
Company, the Board of Directors of the Company, (whose determination shall be
conclusive and shall be evidenced by a Board resolution filed with the Transfer
Agent) shall determine the allocation of the adjusted Exercise Price between or
among shares of such classes of capital stock.

         b. In the event of a capital reorganization or a reclassification of
the Common Stock (except as provided in subsection a. above or subsection e.
below), any Warrant Holder, upon exercise of Warrants, shall be entitled to
receive, in substitution for the Common Stock to which he would have become
entitled upon exercise immediately prior to such reorganization or
reclassification, the shares (of any class or classes) or other securities or
property of the Company (or cash) that he would have been entitled to receive at
the same aggregate Exercise Price upon such reorganization or reclassification
if such Warrants had been exercised immediately prior to the record date with
respect to such event; and in any such case, appropriate provision (as
determined by the Board of Directors of the Company, whose determination shall
be conclusive and shall be
<PAGE>   7
evidenced by a certified Board resolution filed with the Transfer Agent) shall
be made for the application of this Section with respect to the rights and
interests thereafter of the Warrant Holders (including but not limited to the
allocation of the Exercise Price between or among shares of classes of capital
stock), to the end that this Section (including the adjustments of the number of
shares of Common Stock or other securities purchasable and the Exercise Price
thereof) shall thereafter be reflected, as nearly as reasonably practicable, in
all subsequent exercises of the Warrants for any shares or securities or other
property (or cash) thereafter deliverable upon the exercise of the Warrants.

         c. Whenever the number of shares of Common Stock or other securities
purchasable upon exercise of a Warrant is adjusted as provided in this Section,
the Company will promptly file with the Transfer Agent a certificate signed by a
Chairman of the Board or the Chief Executive Officer, the President or a Vice
President of the Company and by the Secretary or an Assistant Secretary of the
Company setting forth the number and kind of securities or other property
purchasable upon exercise of a Warrant, as so adjusted, stating that such
adjustments in the number or kind of shares or other securities or property
conform to the requirements of this Section, and setting forth a brief statement
of the facts accounting for such adjustments. Promptly after receipt of such
certificate, the Company, or the Transfer Agent at the Company's request, will
deliver, by first-class, postage prepaid mail, a brief summary thereof (to be
supplied by the Company) to the registered holders of the outstanding Warrant
Certificates; provided, however, that failure to file or to give any notice
required under this subsection, or any defect therein, shall not affect the
legality or validity of any such adjustments under this Section; and provided,
further, that, where appropriate, such notice may be given in advance and
included as part of the notice required to be given pursuant to Section 18
hereof.

         d. In case of any consolidation of the Company with, or merger of the
Company into, another corporation (other than a consolidation or merger which
does not result in any reclassification or change of the outstanding Common
Stock), or in case of any sale or conveyance to another corporation of the
property of the Company as an entirety or substantially as an entirety, the
corporation formed by such consolidation or merger or the corporation which
shall have acquired such assets, as the case may be, shall execute and deliver
to the Transfer Agent a supplemental warrant agreement providing that the holder
of each Warrant then outstanding shall have the right thereafter (until the
expiration of such Warrant) to receive, upon exercise of such Warrant, solely
the kind and amount of shares of stock and other securities and property (or
cash) receivable upon such consolidation, merger, sale or transfer by a holder
of the number of shares of Common Stock of the Company for which such Warrant
might have been exercised immediately prior to such consolidation, merger, sale
or transfer. Such supplemental warrant agreement shall provide for adjustments
which shall be as nearly equivalent as may be practicable to the adjustments
provided in this Section. The above provision of this subsection shall similarly
apply to successive consolidations, mergers, sales or transfers.

The Transfer Agent shall not have any responsibility to determine the
correctness of any provision contained in any such supplemental warrant
agreement relating to either the kind or amount of shares of stock or securities
or property (or cash) purchasable by holders of Warrant Certificates upon the
exercise of their Warrants after any such consolidation, merger, sale or
transfer or of any adjustment to be made with respect thereto, but subject to
the provisions of Section 23 hereof, may
<PAGE>   8
accept as conclusive evidence of the correctness of any such provisions, and
shall be protected in relying upon, a certificate of a firm of independent
certified public accountants (who may be the accountants regularly employed by
the Company) with respect thereto.

         e. Irrespective of any adjustments in the number or kind of shares
issuable upon exercise of Warrants, Warrant Certificates theretofore or
thereafter issued may continue to express the same price and number and kind of
shares as are stated in the similar Warrant Certificates initially issuable
pursuant to this Agreement.

         f. The Company may retain a firm of independent public accountants of
recognized standing, which may be the firm regularly retained by the Company,
selected by the Board of Directors of the Company or the Executive Committee of
said Board, and not disapproved by the Transfer Agent, to make any computation
required under this Section, and a certificate signed by such firm shall, in the
absence of fraud or gross negligence, be conclusive evidence of the correctness
of any computation made under this Section.

         g. For the purpose of this Section, the term "Common Stock" shall mean
(i) the Common Stock or (ii) any other class of stock resulting from successive
changes or reclassifications of such Common Stock consisting solely of changes
in par value, or from par value to no par value, or from no par value to par
value. In the event that at any time as a result of an adjustment made pursuant
to this Section, the holder of any Warrant thereafter surrendered for exercise
shall become entitled to receive any shares of capital stock of the Company
other than shares of Common Stock, thereafter the number of such other shares so
receivable upon exercise of any Warrant shall be subject to adjustment from time
to time in a manner and on terms as nearly equivalent as practicable to the
provisions with respect to the Common Stock contained in this Section, and all
other provisions of this Agreement, with respect to the Common Stock, shall
apply on like terms to any such other shares.

         h. The Company may, from time to time and to the extent permitted by
law, reduce the exercise price of the Warrants by any amount for a period of not
less than twenty (20) days. If the Company so reduces the exercise price of the
Warrants, it will give not less than fifteen (15) days' notice of such decrease,
which notice may be in the form of a press release, and shall take such other
steps as may be required under applicable law in connection with any offers or
sales of securities at the reduced price.

17. REDUCTION OF EXERCISE PRICE BELOW PAR VALUE. Before taking any action that
would cause an adjustment pursuant to Section 16 hereof reducing the portion of
the Exercise Price required to purchase one share of capital stock below the
then par value (if any) of a share of such capital stock, the Company will use
its best efforts to take any corporate action which, in the opinion of its
counsel, may be necessary in order that the Company may validly and legally
issue fully paid and non-assessable shares of such capital stock.

18. NOTICE TO WARRANT HOLDERS. In case the Company after the date hereof shall
propose (i) to offer to the holders of Common Stock, generally, rights to
subscribe to or purchase any additional shares of any class of its capital
stock, any evidences of its indebtedness or assets, or any other rights or
options or (ii) to effect any reclassification of Common Stock (other than a
<PAGE>   9
reclassification involving merely the subdivision or combination of outstanding
shares of Common Stock) or any capital reorganization, or any consolidation or
merger to which the Company is a party and for which approval of any
stockholders of the Company is required, or any sale, transfer or other
disposition of its property and assets substantially as an entirety, or the
liquidation, voluntary or involuntary dissolution or winding-up of the Company,
then, in each such case, the Company shall file with the Transfer Agent and the
Company, or the Transfer Agent on its behalf, shall mail (by first-class,
postage prepaid mail) to all registered holders of the Warrant Certificates
notice of such proposed action, which notice shall specify the date on which the
books of the Company shall close or a record be taken for such offer of rights
or options, or the date on which such reclassification, reorganization,
consolidation, merger, sale, transfer, other disposition, liquidation, voluntary
or involuntary dissolution or winding-up shall take place or commence, as the
case may be, and which shall also specify any record date for determination of
holders of Common Stock entitled to vote thereon or participate therein and
shall set forth such facts with respect thereto as shall be reasonably necessary
to indicate any adjustments in the Exercise Price and the number or kind of
shares or other securities purchasable upon exercise of Warrants which will be
required as a result of such action. Such notice shall be filed and mailed in
the case of any action covered by clause (i) above, at least ten (10) days prior
to the record date for determining holders of the Common Stock for purposes of
such action or, if a record is not to be taken, the date as of which the holders
of shares of Common Stock of record are to be entitled to such offering; and, in
the case of any action covered by clause (ii) above, at least twenty (20) days
prior to the earlier of the date on which such reclassification, reorganization,
consolidation, merger, sale, transfer, other disposition, liquidation, voluntary
or involuntary dissolution or winding-up is expected to become effective and the
date on which it is expected that holders of shares of Common Stock of record on
such date shall be entitled to exchange their shares for securities or other
property deliverable upon such reclassification, reorganization, consolidation,
merger, sale, transfer, other disposition, liquidation, voluntary or involuntary
dissolution or winding-up. Failure to give any such notice or any defect therein
shall not affect the legality or validity of any transaction listed in this
Section.

19. NO FRACTIONAL WARRANTS, UNITS OR SHARES. The Company shall not be required
to issue fractions of Warrants or Shares of Common Stock upon the separation of
the Units into Common Stock and Warrants, any adjustments as described in
Section 16 or otherwise; but the Company in lieu of issuing any such fractional
interest, shall adjust the fractional interest in Common Stock or Warrants by
payment to the Unit Holder an amount, in cash, equal to 50% of the Closing Price
of the Company's Common Stock and Warrants, respectively, on the date of
separation of the Company's Units.

20. RIGHTS OF WARRANT HOLDERS. No Warrant Holder, as such, shall have any rights
of a shareholder of the Company, either at law or equity, and the rights of the
Warrant Holders, as such, are limited to those rights expressly provided in this
Agreement or in the Warrant Certificates. The Company and the Transfer Agent may
treat the registered Warrant Holder in respect of any Warrant Certificates as
the absolute owner thereof for all purposes notwithstanding any notice to the
contrary.
<PAGE>   10
21. RIGHT OF ACTION. All rights of action in respect to this Agreement are
vested in the respective registered holders of the Warrant and Unit
Certificates; and any registered holder of any Warrant or Unit Certificate,
without the consent of the Transfer Agent or of any other holder of a Warrant or
Unit Certificate, may, in his own behalf for his own benefit, enforce, and may
institute and maintain any suit, action or proceeding against the Company
suitable to enforce, or otherwise in respect of, his right to exercise the
Warrants evidenced by such Warrant Certificate, for the purchase of shares of
the Common Stock in the manner provided in the Warrant Certificate and in this
Agreement.

22. AGREEMENT OF WARRANT AND UNIT HOLDERS. Every holder of a Warrant or Unit
Certificate by accepting the same consents and agrees with the Company, the
Transfer Agent and with every other holder of a Warrant or Unit Certificate,
respectively, that:

         a. The Warrant and Unit Certificates are transferable on the registry
books of the Transfer Agent only upon the terms and conditions set forth in this
Agreement; and

         b. The Company and the Transfer Agent may deem and treat the person in
whose name the Warrant or Unit Certificate is registered as the absolute owner
of the Warrant or Unit, as the case may be, (notwithstanding any notation of
ownership or other writing thereon made by anyone other than the Company or the
Transfer Agent) for all purposes whatever and neither the Company nor the
Transfer Agent shall be affected by any notice to the contrary.

23. TRANSFER AGENT. The Company hereby appoints the Transfer Agent to act as the
agent of the Company and the Transfer Agent hereby accepts such appointment upon
the following terms and conditions by all of which the Company and every Warrant
and Unit Holder, by acceptance of his Warrants or Units, shall be bound:

         a. Statements contained in this Agreement and in the Warrant and Unit
Certificates shall be taken as statements of the Company. The Transfer Agent
assumes no responsibility for the correctness of any of the same except such as
describes the Transfer Agent or for action taken or to be taken by the Transfer
Agent.

         b. The Transfer Agent shall not be responsible for any failure of the
Company to comply with any of the Company's covenants contained in this
Agreement or in the Warrant or Unit Certificates.

         c. The Transfer Agent may consult at any time with counsel satisfactory
to it (who may be counsel for the Company) and the Transfer Agent shall incur no
liability or responsibility to the Company or to any Warrant or Unit Holder in
respect of any action taken, suffered or omitted by it hereunder in good faith
and in accordance with the opinion or the advice of such counsel, provided the
Transfer Agent shall have exercised reasonable care in the selection and
continued employment of such counsel.

         d. The Transfer Agent shall incur no liability or responsibility to the
Company or to any Warrant or Unit Holder for any action taken in reliance upon
any notice, resolution, waiver,
<PAGE>   11
consent, order, certificate or other paper, document or instrument believed by
it to be genuine and to have been signed, sent or presented by the proper party
or parties.

         e. The Company agrees to pay to the Transfer Agent reasonable
compensation for all services rendered by the Transfer Agent in the execution of
this Agreement, to reimburse the Transfer Agent for all expenses, taxes and
governmental charges and all other charges of any kind or nature incurred by the
Transfer Agent in the execution of this Agreement and to indemnify the Transfer
Agent and save it harmless against any and all liabilities, including judgments,
costs and counsel fees, arising from the Transfer Agent's engagement under this
Agreement except as a result of the Transfer Agent's negligence, bad faith or
willful misconduct.

         f. The Transfer Agent shall be under no obligation to institute any
action, suit or legal proceeding or to take any other action likely to involve
expense unless the Company or one or more Warrant or Unit Holders shall furnish
the Transfer Agent with reasonable security and indemnity for any costs and
expenses which may be incurred in connection with such action, suit or legal
proceeding, but this provision shall not affect the power of the Transfer Agent
to take such action as the Transfer Agent may consider proper, whether with or
without any such security or indemnity. All rights of action under this
Agreement or under any of the Warrants or Units may be enforced by the Transfer
Agent without the possession of any of the Warrant or Unit Certificates or the
production thereof at any trial or other proceeding relative thereto, and any
such action, suit or proceeding instituted by the Transfer Agent shall be
brought in its name as Transfer Agent, and any recovery of judgement shall be
for the ratable benefit of the Warrant or Unit Holders as their respective
rights or interest may appear.

         g. The Transfer Agent and any shareholder, director, officer or
employee of the Transfer Agent may buy, sell or deal in any of the Warrants,
Units or other securities of the Company or become pecuniarily interested in any
transaction in which the Company may be interested, or contract with or lend
money to the Company or otherwise act as fully and freely as though it were not
Transfer Agent under this Agreement. Nothing herein shall preclude the Transfer
Agent from acting in any other capacity for the Company or for any other legal
entity.

24. SUCCESSOR TRANSFER AGENT. Any legal entity into which the Transfer Agent may
be merged or converted or with which it may be consolidated, or any legal entity
resulting from any merger, conversion or consolidation to which the Transfer
Agent shall be a party, or any legal entity succeeding to the corporate trust
business of the Transfer Agent, shall be the successor to the Transfer Agent
hereunder without the execution or filing of any paper or any further act of a
party or the parties hereto provided such legal entity is eligible to be
appointed under Section 25 below. In any such event or if the name of the
Transfer Agent is changed, the Transfer Agent or such successor may adopt the
countersignature of the original Transfer Agent and may countersign such Warrant
or Unit Certificates either in the name of the predecessor Transfer Agent or in
the name of the successor Transfer Agent.

25. CHANGE OF TRANSFER AGENT. The Transfer Agent may resign or be discharged by
the Company from its duties under this Agreement by the Transfer Agent or the
Company, as the case may be, giving notice in writing to the other, and by
giving a date when such resignation or discharge shall take effect, which notice
shall be sent at least thirty (30) days prior to the date so
<PAGE>   12
specified. If the Transfer Agent shall resign, be discharged or shall otherwise
become incapable of acting, the Company shall appoint a successor to the
Transfer Agent. If the Company shall fail to make such appointment within a
period of thirty (30) days after it has been notified in writing of such
resignation or incapacity by the resigning or incapacitated Transfer Agent or by
any Warrant or Unit Holder or after discharging the Transfer Agent, then the
Company agrees to perform the duties of the Transfer Agent hereunder until a
successor Transfer Agent is appointed. Any successor Transfer Agent shall be a
bank or a trust company, in good standing, organized under the laws of any state
of the United States of America, having a combined capital and surplus of at
least $4,000,000 at the time of its appointment as Transfer Agent. After
appointment, the successor Transfer Agent shall be vested with the same powers,
rights, duties and responsibilities as if it had been originally named as
Transfer Agent without further act or deed, and the former Transfer Agent shall
deliver and transfer to the successor Transfer Agent any property at the time
held by it hereunder, and execute and deliver any further assurance, conveyance,
act or deed necessary for effecting the delivery or transfer. Failure to give
any notice provided for in this Section, however, or any defect therein, shall
not affect the legality or validity of the resignation or removal of the
Transfer Agent or the appointment of the successor Transfer Agent, as the case
may be.

26. NOTICES. Any notice or demand authorized by this Agreement to be given or
made by the Transfer Agent or by any Warrant or Unit Holder to or on the Company
shall be sufficiently given or made if sent by mail, first class, certified or
registered, postage prepaid, addressed (until another address is filed in
writing by the Company with the Transfer Agent), as follows:

                           TASER International, Inc.
                           7860 E. McClain Drive, Suite 2
                           Scottsdale, Arizona 85260

         Any notice or demand authorized by this Agreement to be given or made
by any Warrant or Unit Holder or by the Company to or on the Transfer Agent
shall be sufficiently given or made if sent by mail, first class, certified or
registered, postage prepaid, addressed (until another address is filed in
writing by the Transfer Agent with the Company), as follows:

                           US Stock Transfer Corporation
                           1745 Gardena Avenue
                           Glendale, California 91204

         Any distribution, notice or demand required or authorized by this
Agreement to be given or made by the Company or the Transfer Agent to or on the
Warrant or Unit Holders shall be sufficiently given or made if sent by mail,
first class, certified or registered, postage prepaid, addressed to the Warrant
or Unit Holders at their last known addresses as they shall appear on the
registration books for the Warrant or Unit Certificates maintained by the
Transfer Agent.

27. SUPPLEMENTS AND AMENDMENTS. The Company and the Transfer Agent may from time
to time supplement or amend this Agreement without the approval of any Warrant
or Unit Holders in order to cure any ambiguity or to correct or supplement any
provision contained herein which may be defective or inconsistent with any other
provisions herein, or to make any other
<PAGE>   13
provisions in regard to matters or questions arising hereunder which the Company
and the Transfer Agent may deem necessary or desirable.

28. SUCCESSORS. All the covenants and provisions of this Agreement by or for the
benefit of the Company or the Transfer Agent shall bind and inure to the benefit
of their respective successors and assigns hereunder.

29. TERMINATION. This Agreement shall terminate at the close of business on the
Expiration Date or such earlier date upon which all Warrants have been
exercised; provided, however, that if exercise of the Warrants is suspended
pursuant to Section 15 and such suspension continues past the Expiration Date,
this Agreement shall terminate at the close of business on the business day
immediately following expiration of such suspension. The provisions of Section
23 shall survive such termination.

30. GOVERNING LAW. This Agreement and each Warrant and Unit Certificate issued
hereunder shall be deemed to be a contract made under the laws of the State of
[California] and for all purposes shall be construed in accordance with the laws
of said State.

31. BENEFITS OF THIS AGREEMENT. Nothing in this Agreement shall be construed to
give any person or corporation other than the Company, the Transfer Agent and
the Warrant and Unit Holders any legal or equitable right, remedy or claim under
this Agreement, and this Agreement shall be for the sole and exclusive benefit
of the Company, the Transfer Agent and the Warrant and Unit Holders.

32. COUNTERPARTS. This Agreement may be executed in any number of counterparts,
each of such counterparts shall for all purposes be deemed to be an original and
all such counterparts shall together constitute but one and the same instrument.

33. INTEGRATION. As of the date hereof, this Agreement contains the entire and
only agreement, understanding, representation, condition, warranty or covenant
between the parties hereto with respect to the matters herein, supersedes any
and all other agreements between the parties hereto relating to such matters,
and may be modified or amended only by a written agreement signed by both
parties hereto pursuant to the authority granted by Section 27.
<PAGE>   14
34. DESCRIPTIVE HEADINGS. The descriptive headings of the Sections of this
Agreement are inserted for convenience only and shall not control or affect the
meaning or construction of any of the provisions hereof.

Date:    _______________, 2001

                                            TASER International, Inc.,
                                            a Delaware corporation

                                            By:_________________________________
                                                     Its Chief Executive Officer

SEAL

ATTEST:

____________________________
Its Secretary

                                            US Stock Transfer Corporation,
                                            a ____________ corporation

                                            By:_________________________________
                                                     Its Vice President

SEAL

ATTEST:

____________________________
Its Secretary
<PAGE>   15
                                    EXHIBIT A
                              [WARRANT CERTIFICATE]
<PAGE>   16
                                    EXHIBIT B
                               [UNIT CERTIFICATE]

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