Document:

<PAGE>

                                   EXHIBIT 4.2

                                 FORM OF WARRANT

    THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
    1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE
    SOLD OR OFFERED FOR SALE IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
    STATEMENT FOR THE SECURITIES OR AN OPINION OF COUNSEL OR OTHER EVIDENCE
    ACCEPTABLE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

                               AMBIENT CORPORATION

                          COMMON STOCK PURCHASE WARRANT

                1.      ISSUANCE. In consideration of good and valuable
consideration, the receipt and sufficiency of which is hereby acknowledged by
AMBIENT CORPORATION, a Delaware corporation (the "Company"),
_____________________________ or registered assigns (the "Holder") is hereby
granted the right to purchase at any time, on or after the Commencement Date (as
defined below) until 5:00 P.M., New York City time, on _____________, 200__1
(the "Expiration Date"), _________________ Thousand __________ (____________)2
fully paid and nonassessable shares of the Company's Common Stock, $0.001 par
value per share (the "Common Stock"), at an initial exercise price per share
(the "Exercise Price") of $0.50 per share, subject to further adjustment as set
forth herein. This Warrant is being issued pursuant to the terms of that certain
Securities Purchase Agreement, dated as of December ___, 2004 (the "Agreement"),
to which the Company and Holder (or Holder's predecessor in interest) are
parties. Capitalized terms not otherwise defined herein shall have the meanings
ascribed to them in the Agreement. This Warrant was originally issued to the
Holder of the Holder's predecessor in interest on _____________, 20043 (the
"Issue Date").

                2.      EXERCISE OF WARRANTS.

                        2.1     GENERAL.

                        (a)     This Warrant is exercisable in whole or in part
at any time and from time to time commencing on the Commencement Date (as
defined below). Such exercise shall be effectuated by submitting to the Company
(either by delivery to the Company or by facsimile transmission as provided in
Section 8 hereof) a completed and duly executed Notice of Exercise
(substantially in the form attached to this Warrant Certificate) as provided in
the Notice of Exercise (or revised by notice given by the Company as
contemplated by the Section headed "NOTICES" in the Agreement). The date such
Notice of

-------------------------
1 Insert date which the last calendar of the month in which the third
anniversary of the Buyer's Closing Date occurs.
2 Insert number equal one hundred percent (100%) of the Issue Date Conversion
Shares.
3 Insert the Buyer's Closing Date.

                                       1
<PAGE>

Exercise is faxed to the Company shall be the "Exercise Date," provided that, if
such exercise represents the full exercise of the outstanding balance of the
Warrant, the Holder of this Warrant tenders this Warrant Certificate to the
Company within five (5) Trading Days thereafter. The Notice of Exercise shall be
executed by the Holder of this Warrant and shall indicate (i) the number of
shares then being purchased pursuant to such exercise and (ii) if applicable (as
provided below), whether the exercise is a cashless exercise.

                        (b)     The provisions of this Section 2.1(b) shall only
be applicable (i) on or after the first anniversary of the Issue Date, and (ii)
if, and only if, on the Exercise Date there is no effective Registration
Statement covering the Warrant Shares (other than during a Permitted Suspension
Period, as defined in the Registration Rights Agreement). If the Notice of
Exercise form elects a "cashless" exercise, the Holder shall thereby be entitled
to receive a number of shares of Common Stock equal to (w) the excess of the
Current Market Value (as defined below) over the total cash exercise price of
the portion of the Warrant then being exercised, divided by (x) the Market Price
of the Common Stock as of the trading day immediately prior to the Exercise
Date. For the purposes of this Warrant, the terms (y) "Current Market Value"
shall mean an amount equal to the Market Price of the Common Stock as of the
Trading Day immediately prior to the Exercise Date, multiplied by the number of
shares of Common Stock specified in such Notice of Exercise Form, and (z)
"Market Price of the Common Stock" shall mean the Closing Price (as defined
below) of the Common Stock.

                        (c)     If the Notice of Exercise form elects a "cash"
exercise (or if the cashless exercise referred to in the immediately preceding
paragraph (b) is not available in accordance with its terms), the Exercise Price
per share of Common Stock for the shares then being exercised shall be payable,
at the election of the Holder, in cash or by certified or official bank check or
by wire transfer in accordance with instructions provided by the Company at the
request of the Holder..

                        (d)     Upon the appropriate payment, if any, of the
Exercise Price for the shares of Common Stock purchased, together with the
surrender of this Warrant Certificate (if required), the Holder shall be
entitled to receive a certificate or certificates for the shares of Common Stock
so purchased. The Company shall deliver such certificates representing the
Warrant Shares in accordance with the instructions of the Holder as provided in
the Notice of Exercise (the certificates delivered in such manner, the "Warrant
Share Certificates") within three (3) Trading Days (such third Trading Day, a
"Warrant Share Delivery Date") of (i) with respect to a "cashless exercise," the
Exercise Date or, (ii) with respect to a "cash" exercise, the later of the
Exercise Date or the date the payment of the Exercise Price for the relevant
Warrant Shares is received by the Company.

                        (e)     The Holder shall be deemed to be the holder of
the shares issuable to it in accordance with the provisions of this Section 2.1
on the Exercise Date.

                        2.2     LIMITATION ON EXERCISE. Notwithstanding the
provisions of this Warrant, the Agreement or of the other Transaction
Agreements, in no event (except (i) as

                                       2
<PAGE>

specifically provided in this Warrant as an exception to this provision, (ii)
during the forty-five (45) day period prior to the Expiration Date, or (iii)
while there is outstanding a tender offer for any or all of the shares of the
Company's Common Stock) shall the Holder be entitled to exercise this Warrant,
or shall the Company have the obligation to issue shares upon such exercise of
all or any portion of this Warrant to the extent that, after such exercise the
sum of (1) the number of shares of Common Stock beneficially owned by the Holder
and its affiliates (other than shares of Common Stock which may be deemed
beneficially owned through the ownership of the unexercised portion of the
Warrants or other rights to purchase Common Stock or through the ownership of
the unconverted portion of convertible securities), and (2) the number of shares
of Common Stock issuable upon the exercise of the Warrants with respect to which
the determination of this proviso is being made, would result in beneficial
ownership by the Holder and its affiliates of more than 4.99% of the outstanding
shares of Common Stock (after taking into account the shares to be issued to the
Holder upon such exercise). For purposes of the proviso to the immediately
preceding sentence, beneficial ownership shall be determined in accordance with
Section 13(d) of the Securities Exchange Act of 1934, as amended (the "1934
Act"), except as otherwise provided in clause (1) of such sentence. The Holder,
by its acceptance of this Warrant, further agrees that if the Holder transfers
or assigns any of the Warrants to a party who or which would not be considered
such an affiliate, such assignment shall be made subject to the transferee's or
assignee's specific agreement to be bound by the provisions of this Section 2.2
as if such transferee or assignee were the original Holder hereof.

                        2.3     CERTAIN DEFINITIONS. As used herein, each of the
following terms has the meaning set forth below, unless the context otherwise
requires:

                        (a)     "Commencement Date" means the earlier of (i) the
date which is sixty-five (65) days after the Issue Date, or (ii) the Effective
Date.

                        (b)     "Closing Price" means the 4:00 P.M. closing bid
price of the Common Stock on the Principal Trading Market on the relevant
Trading Day(s), as reported by the Reporting Service for the relevant date.

                        (c)     "Reporting Service" means Bloomberg LP or if
that service is not then reporting the relevant information regarding the Common
Stock, a comparable reporting service of national reputation selected by a
Majority in Interest of the Holders and reasonably acceptable to the Company.

                3.      RESERVATION OF SHARES. The Company hereby agrees that at
all times during the term of this Warrant there shall be reserved for issuance
upon exercise of this Warrant

        (x) until the Final Lock-up Date, one hundred ten percent (110%) of the
        number of shares of its Common Stock as shall be required for issuance
        of the Warrant Shares for the then unexercised portion of this Warrant,
        and

        (y) thereafter, one hundred percent (100%)

                                       3
<PAGE>

of the number of shares of its Common Stock as shall be required for issuance of
the Warrant Shares for the then unexercised portion of this Warrant. For the
purposes of such calculations, the Company should assume that the outstanding
portion of this Warrants were exercisable in full at any time, without regard to
any restrictions which might limit the Holder's right to exercise any portion of
this Warrant held by the Holder.

                4.      MUTILATION OR LOSS OF WARRANT. Upon receipt by the
Company of evidence satisfactory to it of the loss, theft, destruction or
mutilation of this Warrant, and (in the case of loss, theft or destruction)
receipt of reasonably satisfactory indemnification, and (in the case of
mutilation) upon surrender and cancellation of this Warrant, the Company will
execute and deliver a new Warrant of like tenor and date and any such lost,
stolen, destroyed or mutilated Warrant shall thereupon become void.

                5.      RIGHTS OF THE HOLDER. The Holder shall not, by virtue
hereof, be entitled to any rights of a stockholder in the Company, either at law
or equity, and the rights of the Holder are limited to those expressed in this
Warrant and are not enforceable against the Company except to the extent set
forth herein.

                6.      PROTECTION AGAINST DILUTION AND OTHER ADJUSTMENTS.

                        6.1     ADJUSTMENT MECHANISM. If an adjustment of the
Exercise Price is required pursuant to this Section 6, the Holder shall be
entitled to purchase such number of shares of Common Stock as will cause (i) (x)
the total number of shares of Common Stock Holder is entitled to purchase
pursuant to this Warrant following such adjustment, multiplied by (y) the
adjusted Exercise Price per share, to equal the result of (ii) (x) the dollar
amount of the total number of shares of Common Stock Holder is entitled to
purchase before adjustment, multiplied by (y) the total Exercise Price before
adjustment.4

                        6.2     CAPITAL ADJUSTMENTS. In case of any stock split
or reverse stock split, stock dividend, reclassification of the Common Stock,
recapitalization, merger or consolidation (where the Company is not the
surviving entity), the provisions of this Section 6 shall be applied as if such
capital adjustment event had occurred immediately prior to the date of this
Warrant and the original Exercise Price had been fairly allocated to the stock
resulting from such capital adjustment; and in other respects the provisions of
this Section shall be applied in a fair, equitable and reasonable manner so as
to give effect, as nearly as may be, to the purposes hereof. A rights offering
to stockholders shall be deemed a stock dividend to the extent of the bargain
purchase element of the rights. The Company will not effect any consolidation or
merger, unless prior to the consummation thereof, the successor or acquiring
entity (if other than the Company) and, if an entity different from the
successor or acquiring entity, the entity whose capital stock or assets the
holders of the Common Stock of the Company are entitled to receive as a result
of such consolidation or merger assumes by written instrument the obligations

-----------------------
4 Example: Assume 10,000 shares remain under Warrant at original stated Exercise
Price of US$0.50. Total exercise price (clause (y) in text) is (i) 10,000 x (ii)
US$0.50, or US$5,000. Company effects 2:1 stock split. Exercise Price is
adjusted to US$0.25. Number of shares covered by Warrant is adjusted to 20,000,
because (applying clause (x) in text) (i) 20,000 x (ii) US$0.25 = US$5,000.

                                       4
<PAGE>

under this Warrant (including under this Section 6) and the obligations to
deliver to the holder of this Warrant such shares of stock, securities or assets
as, in accordance with the foregoing provisions, the holder may be entitled to
acquire.

                        6.3     ADJUSTMENT FOR SPIN OFF. If, for any reason,
prior to the exercise of this Warrant in full, the Company spins off or
otherwise divests itself of a part of its business or operations or disposes all
or of a part of its assets in a transaction (the "Spin Off") in which the
Company does not receive compensation for such business, operations or assets,
but causes securities of another entity (the "Spin Off Securities") to be issued
to security holders of the Company, then the Company shall cause (i) to be
reserved Spin Off Securities equal to the number thereof which would have been
issued to the Holder had all of the Holder's unexercised Warrants outstanding on
the record date (the "Record Date") for determining the amount and number of
Spin Off Securities to be issued to security holders of the Company (the
"Outstanding Warrants") been exercised as of the close of business on the
Trading Day immediately before the Record Date (the "Reserved Spin Off Shares"),
and (ii) to be issued to the Holder on the exercise of all or any of the
Outstanding Warrants, such amount of the Reserved Spin Off Shares equal to (x)
the Reserved Spin Off Shares, multiplied by (y) a fraction, of which (I) the
numerator is the amount of the Outstanding Warrants then being exercised, and
(II) the denominator is the amount of the Outstanding Warrants.

                        6.4     ADJUSTMENT FOR CERTAIN TRANSACTIONS. Reference
is made to the provisions of Section 4(g) of the Agreement, the terms of which
are incorporated herein by reference. The number of shares covered by this
Warrant and the Exercise Price shall be adjusted as provided in the applicable
provisions of said Section 4(g) of the Agreement.

                7.      TRANSFER TO COMPLY WITH THE SECURITIES ACT; REGISTRATION
                        RIGHTS.

                        7.1     TRANSFER. This Warrant has not been registered
under the Securities Act of 1933, as amended, (the "Act") and has been issued to
the Holder for investment and not with a view to the distribution of either the
Warrant or the Warrant Shares. Neither this Warrant nor any of the Warrant
Shares or any other security issued or issuable upon exercise of this Warrant
may be sold, transferred, pledged or hypothecated in the absence of an effective
registration statement under the Act relating to such security or an opinion of
counsel satisfactory to the Company that registration is not required under the
Act. Each certificate for the Warrant, the Warrant Shares and any other security
issued or issuable upon exercise of this Warrant shall contain a legend on the
face thereof, in form and substance satisfactory to counsel for the Company,
setting forth the restrictions on transfer contained in this Section.

                        7.2     REGISTRATION RIGHTS.   (a) Reference is made to
the Registration Rights Agreement. The Company's obligations under the
Registration Rights Agreement and the other terms and conditions thereof with
respect to the Warrant Shares, including, but not necessarily limited to, the
Company's commitment to file a registration statement including the Warrant
Shares, to have the registration of the Warrant Shares completed and effective,
and to maintain such registration, are incorporated herein by reference.

                                       5
<PAGE>

                        (b)     In addition to the registration rights referred
to in the preceding provisions of Section 7.2(a), effective after the expiration
of the effectiveness of the Registration Statement as contemplated by the
Registration Rights Agreement, the Holder shall have piggy-back registration
rights with respect to the Warrant Shares then held by the Holder or then
subject to issuance upon exercise of this Warrant (collectively, the "Remaining
Warrant Shares"), subject to the conditions set forth below. If, at any time
after the Registration Statement has ceased to be effective, the Company
participates (whether voluntarily or by reason of an obligation to a third
party) in the registration of any shares of the Company's stock (other than a
registration on Form S-8 or on Form S-4), the Company shall give written notice
thereof to the Holder and the Holder shall have the right, exercisable within
ten (10) Trading Days after receipt of such notice, to demand inclusion of all
or a portion of the Holder's Remaining Warrant Shares in such registration
statement. If the Holder exercises such election, the Remaining Warrant Shares
so designated shall be included in the registration statement at no cost or
expense to the Holder (other than any costs or commissions which would be borne
by the Holder under the terms of the Registration Rights Agreement). The
Holder's rights under this Section 7 shall expire at such time as the Holder can
sell all of the Remaining Warrant Shares under Rule 144 without volume or other
restrictions or limit.

                8.      BUY-IN AMOUNT.

                (a)     If, by the relevant Warrant Share Delivery Date, the
Company fails for any reason to deliver the relevant Warrant Share Certificates,
and after such Warrant Share Delivery Date, the Holder who has exercised this
Warrant (an "Exercising Holder") purchases, in an arm's-length open market
transaction or otherwise, shares of Common Stock (the "Covering Shares") in
order to make delivery in satisfaction of a sale of Common Stock by the
Exercising Holder (the "Sold Shares"), which delivery such Exercising Holder
anticipated to make using the shares to be issued upon such exercise (a
"Buy-In"), the Exercising Holder shall have the right to require the Company to
pay to the Exercising Holder, in addition to and not in lieu of all other
amounts contemplated in other provisions of the Transaction Agreements, the
Warrant Share Buy-In Adjustment Amount (as defined below). The Company shall pay
the Warrant Share Buy-In Adjustment Amount to the Exercising Holder in
immediately available funds immediately upon demand by the Exercising Holder.

                (b)     The term "Warrant Share Buy-In Adjustment Amount" means
the amount equal to the excess, if any, of (i) the Exercising Holder's total
purchase price (including brokerage commissions, if any) for the Covering Shares
over (ii) the net proceeds (after brokerage commissions, if any) received by the
Exercising Holder from the sale of the Sold Shares. By way of illustration and
not in limitation of the foregoing, if the Exercising Holder purchases shares of
Common Stock having a total purchase price (including brokerage commissions) of
$11,000 to cover a Buy-In with respect to shares of Common Stock it sold for net
proceeds of $10,000, the Warrant Share Buy-In Adjustment Amount which the
Company will be required to pay to the Exercising Holder will be $1,000.

                9.      NOTICES. Any notice required or permitted hereunder
shall be given in manner provided in the Section headed "NOTICES" in the
Agreement, the terms of which are incorporated herein by reference.

                                       6
<PAGE>

                10.     SUPPLEMENTS AND AMENDMENTS; WHOLE AGREEMENT. This
Warrant may be amended or supplemented only by an instrument in writing signed
by the parties hereto. This Warrant contains the full understanding of the
parties hereto with respect to the subject matter hereof and thereof and there
are no representations, warranties, agreements or understandings other than
expressly contained herein and therein.

                11.     GOVERNING LAW. This Warrant shall be deemed to be a
contract made under the laws of the State of New York for contracts to be wholly
performed in such state and without giving effect to the principles thereof
regarding the conflict of laws. Each of the parties consents to the jurisdiction
of the federal courts whose districts encompass any part of the County of New
York or the state courts of the State of New York sitting in the County of New
York in connection with any dispute arising under this Warrant and hereby
waives, to the maximum extent permitted by law, any objection, including any
objection based on FORUM NON CONVENIENS, to the bringing of any such proceeding
in such jurisdictions. To the extent determined by such court, the Company shall
reimburse the Holder for any reasonable legal fees and disbursements incurred by
the Buyer in enforcement of or protection of any of its rights under any of the
Transaction Agreements.

                12.     JURY TRIAL WAIVER. The Company and the Holder hereby
waive a trial by jury in any action, proceeding or counterclaim brought by
either of the Parties hereto against the other in respect of any matter arising
out or in connection with this Warrant.

                13.     REMEDIES. The Company stipulates that the remedies at
law of the Holder of this Warrant in the event of any default or threatened
default by the Company in the performance of or compliance with any of the terms
of this Warrant are not and will not be adequate and that, to the fullest extent
permitted by law, such terms may be specifically enforced by a decree for the
specific performance of any agreement contained herein or by an injunction
against a violation of any of the terms hereof or otherwise.

                14.     COUNTERPARTS. This Warrant may be executed in any number
of counterparts and 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.

                   [Balance of page intentionally left blank]

                                       7
<PAGE>

                15      DESCRIPTIVE HEADINGS. Descriptive headings of the
several Sections of this Warrant are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

        IN WITNESS WHEREOF, the parties hereto have executed this Warrant as of
the 23th day of December, 2004.

                                          AMBIENT CORPORATION

                                          By:/s/ John J. Joyce

                                          John J. Joyce
                                          (Print Name)

                                          Chief Executive Officer
                                          (Title)

                                       8
<PAGE>

                          NOTICE OF EXERCISE OF WARRANT

TO:     AMBIENT CORPORATION.                          VIA TELECOPIER TO:
        79 Chapel Street                              (617) 332-7260
        Newton, Massachusetts 02458
        Attn: CEO

        The undersigned hereby irrevocably elects to exercise the right,
represented by the Warrant Certificate for the above-referenced Class, dated as
of ________________, 20___ , to purchase ___________ shares of the Common Stock,
$0.001 par value ("Common Stock"), of AMBIENT CORPORATION and tenders herewith
payment in accordance with Section 2 of said Common Stock Purchase Warrant, as
follows:

_       CASH: $_____________________   =  (Exercise Price x Exercise Shares)

           Payment is being made by:

                 __    enclosed check

                 __    wire transfer

                 __    other

_       CASHLESS EXERCISE [if available pursuant to Section 2.1(b)]:

           Net number of Warrant Shares to be issued to Holder :   ________*

           * based on: Current Market Value - (Exercise Price X Exercise Shares)
                       ---------------------------------------------------------
                                       Market Price of Common Stock
           where:
           Market Price of Common Stock ["MP"]           =     $_______________
           Current Market Value [MP x Exercise Shares]   =     $_______________

        It is the intention of the Holder to comply with the provisions of
Section 2.2 of the Warrant regarding certain limits on the Holder's right to
exercise thereunder. Based on the analysis on the attached Worksheet Schedule,
the Holder believes this exercise complies with the provisions of said Section
2.2. Nonetheless, to the extent that, pursuant to the exercise effected hereby,
the Holder would have more shares than permitted under said Section, this notice
should be amended and revised, ab initio, to refer to the exercise which would
result in the issuance of shares consistent with such provision. Any exercise
above such amount is hereby deemed void and revoked.

        As contemplated by the Warrant, this Notice of Conversion is being sent
by facsimile to the telecopier number and officer indicated above.

                                       9
<PAGE>

        If this Notice of Exercise represents the full exercise of the
outstanding balance of the Warrant, the Holder either (1) has previously
surrendered the Warrant to the Company or (2) will surrender (or cause to be
surrendered) the Warrant to the Company at the address indicated above by
express courier within five (5) Trading Days after delivery or facsimile
transmission of this Notice of Exercise.

        The certificates representing the Warrant Shares should be transmitted
by the Company to the Holder

             via express courier, or

             by electronic transfer

after receipt of this Notice of Exercise (by facsimile transmission or
otherwise) to:

             _____________________________________
             _____________________________________
             _____________________________________

Dated: ______________________

_____________________________
[Name of Holder]

                          By: _________________________

                                       10
<PAGE>

                          NOTICE OF EXERCISE OF WARRANT
                               WORKSHEET SCHEDULE

1. Current Common Stock holdings of Holder and Affiliates          ___________
2. Shares to be issued on current exercise                         ___________
3. Other shares to be issued on other current exercise(s) and
         other current conversion(s)5                              ___________
4. Other shares eligible to be acquired within next 60 days
         without restriction                                       ___________
5. Total [sum of Lines 1 through 4]                                ___________

6. Outstanding shares of Common Stock6                             ___________
7. Adjustments to Outstanding
       a. Shares known to Holder as previously issued
          to Holder or others but not included in Line 6           ___________
       b. Shares to be issued per Line(s) 2 and 3                  ___________
       c. Total Adjustments [Lines 7a and 7b]                      ___________
8. Total Adjusted Outstanding [Lines 6 plus 7c]                    ___________

9. Holder's Percentage [Line 5 divided by Line 8]                  __________%
[Note: Line 9 not to be above 4.99%]

-------------------------
5 Includes shares issuable on conversion of convertible securities (including
assumed payment of interest or dividends) or exercise of other rights, including
other warrants or options
6 Based on latest SEC filing by Company or information provided by executive
officer of Company, counsel to Company or transfer agent

                                       11<PAGE>

                                  EXHIBIT 10.1

                          SECURITIES PURCHASE AGREEMENT

                THIS SECURITIES PURCHASE AGREEMENT, dated as of December 23,
2004 (this "Agreement"), is entered into by and between AMBIENT CORPORATION, a
Delaware corporation with headquarters located at 79 Chapel Street, Newton, MA
02458 (the "Company"), and each individual or entity named on an executed
counterpart of the signature page hereto (each such signatory is referred to as
the "Lender" or a "Lender") (each agreement with a Lender being deemed a
separate and independent agreement between the Company and such Lender, except
that each Lender acknowledges and consents to the rights granted to each other
Lender [each, an "Other Lender"] under such agreement and the Transaction
Agreements, as defined below, referred to therein).

                              W I T N E S S E T H:

                WHEREAS, the Company and the Lender are executing and delivering
this Agreement in reliance upon the exemption from securities registration for
offers and sales to accredited investors afforded, INTER alia, by Rule 506 under
Regulation D ("Regulation D") as promulgated by the United States Securities and
Exchange Commission (the "SEC") under the Securities Act of 1933, as amended
(the "1933 Act"), and/or Section 4(2) of the 1933 Act; and

                WHEREAS, the Lender wishes to lend to the Company, subject to
and upon the terms and conditions of this Agreement and acceptance of this
Agreement by the Company, the Lender's Purchase Price amount set forth on the
Lender's signature page hereto, the repayment of which will be represented by 6%
Convertible Debentures Series 04-01 of the Company (the "Convertible
Debentures"), which Convertible Debentures will be convertible into shares of
Common Stock, $.001 par value per share, of the Company (the "Common Stock"),
upon the terms and subject to the conditions of such Convertible Debentures,
together with the Warrants (as defined below) exercisable for the purchase of
shares of Common Stock;

                NOW THEREFORE, in consideration of the premises and the mutual
covenants contained herein and other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties agree as
follows:

        1.      AGREEMENT TO PURCHASE; PURCHASE PRICE.

                A.      PURCHASE.

                (i)     Subject to the terms and conditions of this Agreement
and the other Transaction Agreements, the undersigned hereby agrees to loan to
the Company the principal amount set forth on the Lender's signature page of
this Agreement (the "Purchase Price"), out of the aggregate amount being loaned
by all Lenders of US $5,500,000 (the "Aggregate Purchase Price"). The obligation
to repay the loan from the Lender shall be evidenced by the Company's issuance
of one or more Convertible Debentures to the Lender in such principal amount
(the Convertible Debentures issued to the Lender, the "Debentures"). Each
Debenture (i) shall provide for a conversion price (the "Conversion Price"),
which shall initially be the Fixed Conversion Price (as defined below), which
price may be adjusted from time to as provided in

<PAGE>

the Debenture, and (ii) shall have the terms and conditions of, and be
substantially in the form attached hereto as, ANNEX I.

                (ii)    The loan to be made by the Lender and the issuance of
the Debentures and the Warrants (collectively, the "Purchased Securities") to
the Lender are sometimes referred to herein and in the other Transaction
Agreements as the purchase and sale of the Debentures and the Warrants.

                B.      CERTAIN DEFINITIONS. As used herein, each of the
following terms has the meaning set forth below, unless the context otherwise
requires:

                "Affiliate" means, with respect to a specific Person referred to
in the relevant provision, another Person who or which controls or is controlled
by or is under common control with such specified Person.

                "Certificates" means the (x) the original ink-signed Debentures
and (y) the original ink-signed Warrants, each duly executed by the Company and
issued in the name of the Lender on the Closing Date.

                "Closing Date" means the date of the closing of the purchase and
sale of the Purchased Securities.

                "Company Control Person" means each director, executive officer,
promoter, and such other Persons as may be deemed in control of the Company
pursuant to Rule 405 under the 1933 Act or Section 20 of the 1934 Act.

                "Conversion Certificates" means certificates representing the
Conversion Shares.

                "Conversion Shares" means the shares of Common Stock issuable
upon conversion of the Debentures (including, if relevant, accrued interest on
the Debentures so converted).

                "Converting Holder" means the Holder of Debentures who or which
has submitted a Notice of Conversion (as contemplated by the Debentures).

                "Disclosure Letter" means a letter and any modifications
thereof, the latest of which is dated at least two Trading Days prior to the
Closing Date, from the Company to the Lenders; provided, however, that the
Disclosure Letter shall be arranged in sections corresponding to the identified
Sections of this Agreement, but the disclosure in any such section of the
Disclosure Letter shall qualify other provisions in this Agreement to the extent
that it would be readily apparent to an informed reader from a reading of such
section of the Disclosure Letter that it is also relevant to other provisions of
this Agreement.

                "Effective Date" means the date the Registration Statement
covering the Registrable Securities is declared effective by the SEC.

                                                                               2
<PAGE>

                "Escrow Agent" means the escrow agent identified in the Joint
Escrow Instructions attached hereto as ANNEX II (the "Joint Escrow
Instructions").

                "Escrow Funds" means the Purchase Price delivered to the Escrow
Agent as contemplated by Sections 1(c) and (d) hereof.

                "Escrow Property" means the Escrow Funds and the Certificates
delivered to the Escrow Agent as contemplated by Section 1(c) hereof.

                "Exercise Price" means the per share exercise price of the
relevant Warrant.

                "Finder" means Brasshorn Limited.

                "Fixed Conversion Price" means $0.25 (as that amount may be
adjusted as provided in the Debentures or herein).

                "Holder" means the Person holding the relevant Securities at the
relevant time.

                "Issue Date Conversion Share" means the number of shares of
Common Stock equal to (x) the Purchase Price paid by the Lender, divided by (y)
the Fixed Conversion Price.

                "Last Audited Date" means December 31, 2003.

                "Lender Control Person" means each director, executive officer,
promoter, and such other Persons as may be deemed in control of the Lender
pursuant to Rule 405 under the 1933 Act or Section 20 of the 1934 Act (as
defined below).

                "Lender's Allocable Share" means the fraction, of which (i) the
numerator is the Lender's Purchase Price and (ii) the denominator is the
Aggregate Purchase Price.

                "Mandatory Conversion Date" shall have the meaning ascribed to
it in the Convertible Debentures.

                "Majority in Interest of the Holders" means one or more Holders
whose respective outstanding principal amounts of the Debentures held by each of
them on the relevant date, aggregate more than fifty percent (50%) of the total
of the Lender's and the Other Lenders' aggregate outstanding principal amounts
of the Debentures held by the Lender and the Other Lenders on that date.

                "Material Adverse Effect" means an event or combination of
events, which individually or in the aggregate, would reasonably be expected to
(x) adversely affect the legality, validity or enforceability of the Purchased
Securities or any of the Transaction Agreements, (y) have or result in a
material adverse effect on the results of operations, assets, or financial
condition of the Company and its subsidiaries, taken as a whole, or (z)
adversely impair the Company's ability to perform fully on a timely basis its
material obligations under any of the Transaction Agreements or the transactions
contemplated thereby.

                                                                               3
<PAGE>

                "New Common Stock" means shares of Common Stock and/or
securities convertible into, and/or other rights exercisable for, Common Stock,
which are offered or sold in a New Transaction.

                "New Investor" means the third party investor, purchaser or
lender (howsoever denominated) in a New Transaction.

                "New Transaction" means the sale of New Common Stock by or on
behalf of the Company to a New Investor in a transaction offered or consummated
after the date hereof; provided, however, that it is specifically understood
that the term "New Transaction" (1) includes, but is not limited to, a sale of
Common Stock or of a security convertible into Common Stock or an equity or
credit line transaction, but (2) does not include (a) the sale of the Purchased
Securities to the Lender and the Other Lenders, (b) the issuance of Common Stock
upon the exercise or conversion of options, warrants or convertible securities
outstanding on the date hereof, or in respect of any other financing agreements
as in effect on the date hereof and identified in the Disclosure Letter
(provided the same is not amended after the date of the Disclosure Letter), (c)
the issuance of Common Stock pursuant to an Employee Stock Option Plan (an
"ESOP") of the Company, such ESOP having been properly approved by the
shareholders of the Company prior to the date of this Agreement, (d) the
issuance of Common Stock pursuant to a non-employee director or consultants'
stock option plan of the Company, as in effect prior to the date of this
Agreement, (e) the issuance of Common Stock upon the exercise of any options or
warrants referred to in the preceding clauses of this paragraph (provided the
same is not amended after the date hereof), or (f) to a Strategic Partner.

                "Person" means any living person or any entity, such as, but not
necessarily limited to, a corporation, partnership or trust.

                "Principal Trading Market" means the Over the Counter Bulletin
Board or such other market on which the Common Stock is principally traded at
the relevant time, but shall not include the "pink sheets."

                "Registrable Securities" shall have the meaning ascribed to it
in the Registration Rights Agreement.

                "Registration Rights Agreement" means the Registration Rights
Agreement in the form annexed hereto as ANNEX IV as executed by the Lender and
the Company simultaneously with the execution of this Agreement.

                "Registration Statement" means an effective registration
statement covering the Registrable Securities.

                "Securities" means the Purchased Securities and the Shares.

                "Shares" means the shares of Common Stock representing any or
all of the Conversion Shares, the Warrant Shares and the Payment Shares (as
defined in the Registration Rights Agreement).

                                                                               4
<PAGE>

                "State of Incorporation" means Delaware.

                "Strategic Partner" means a third party, whether or not
affiliated with the Company as of the date hereof, which party (i) either (a) is
engaged in a business which is the business in which the Company is engaged or a
similar, related or complementary business, or (ii) is a utility or other
provider of electrical power, and (ii) either (a) subsequently purchases equity
securities of the Company (or securities convertible into equity securities of
the Company), or (b) enters into an agreement for one or more of the following:
the licensing by the Company of all or any portion of its technology to such
third party, the licensing by such third party of all or any portion of its
technology to the Company, or any other coordination of all or a portion of
their respective business activities or operations by the Company and such third
party.

                "Trading Day" means any day during which the Principal Trading
Market shall be open for business.

                "Transaction Agreements" means this Agreement, the Debentures,
the Joint Escrow Instructions, the Registration Rights Agreement, the Disclosure
Letter, and the Warrants, and includes all ancillary documents referred to in
those agreements and documents.

                "Transfer Agent" means, at any time, the transfer agent for the
Company's Common Stock.

                "Warrants" means (i) the warrants referred to in Section 4
hereof and (ii) the Additional Warrants, if any.

                "Warrant Shares" means the shares of Common Stock issuable upon
exercise of the Warrants.

                C.              FORM OF PAYMENT; DELIVERY OF CERTIFICATES.

                (i)     The Lender shall pay the Purchase Price by delivering
immediately available good funds in United States Dollars to the Escrow Agent no
later than the date prior to the Closing Date.

                (ii)    Within three (3) Trading Days after the Escrow Agent
notifies the Company that the Escrow Agent has on deposit cleared funds from or
on behalf of one or more Lenders an aggregate amount equal to the Aggregate
Purchase Price and the Company shall have accepted the Lender's subscription
hereunder, but in no event later than the Closing Date, the Company will deliver
the relevant Certificates to the Escrow Agent. Such Certificates shall be held
in escrow as provided in the Joint Escrow Instructions.

                (iii)   By signing this Agreement, each of the Lender and the
Company, subject to acceptance by the Escrow Agent, agrees to all of the terms
and conditions of, and becomes a party to, the Joint Escrow Instructions, all of
the provisions of which are incorporated herein by this reference as if set
forth in full.

                                                                               5
<PAGE>

                D.      METHOD OF PAYMENT. Payment into escrow of the Purchase
Price shall be made by wire transfer of funds to:

                        Bank of New York
                        350 Fifth Avenue
                        New York, New York 10001

                        ABA# 021000018
                        For credit to the account of Krieger & Prager LLP
                        Account No.: [To be provided to the Lender by
                                     Krieger & Prager LLP]
                        Re: Ambient 12/04 Transaction/[NAME OF LENDER]

                2.      LENDER REPRESENTATIONS, WARRANTIES, ETC.; ACCESS TO
INFORMATION; INDEPENDENT INVESTIGATION.

                The Lender represents and warrants to, and covenants and agrees
with, the Company as follows:

                Without limiting Lender's right to sell the Securities pursuant
to an effective registration statement or otherwise in compliance with the 1933
Act, the Lender is purchasing the Securities for its own account for investment
only and not with a view towards the public sale or distribution thereof and not
with a view to or for sale in connection with any distribution thereof.

                The Lender is (i) an "accredited investor" as that term is
defined in Rule 501 of the General Rules and Regulations under the 1933 Act,
(ii) experienced in making investments of the kind described in this Agreement
and the other Transaction Agreements, (iii) able, by reason of the business and
financial experience of its officers (if an entity) and professional advisors
(who are not affiliated with or compensated in any way by the Company or any of
its Affiliates or selling agents), to protect its own interests in connection
with the transactions described in this Agreement and the other Transaction
Agreements, and to evaluate the merits and risks of an investment in the
Securities, and (iv) able to afford the entire loss of its investment in the
Securities.

                All subsequent offers and sales of the Securities by the Lender
shall be made pursuant to registration of the relevant Securities under the 1933
Act or pursuant to an exemption from such registration.

                The Lender understands that the Securities are being offered and
sold to it in reliance on specific exemptions from the registration requirements
of the 1933 Act and state securities laws and that the Company is relying upon
the truth and accuracy of, and the Lender's compliance with, the
representations, warranties, agreements, acknowledgments and understandings of
the Lender set forth herein in order to determine the availability of such
exemptions and the eligibility of the Lender to acquire the Securities.

                The Lender and its advisors, if any, have been furnished with or
have been given access to all materials relating to the business, finances and
operations of the Company and

                                                                               6
<PAGE>

materials relating to the offer and sale of the Purchased Securities which have
been requested by the Lender, including those set forth on in any annex attached
hereto. The Lender and its advisors, if any, have been afforded the opportunity
to ask questions of the Company and its management and have received complete
and satisfactory answers to any such inquiries. Without limiting the generality
of the foregoing, the Lender has also had the opportunity to obtain and to
review the Company's filings on EDGAR listed on ANNEX VI hereto (the documents
listed on such Annex VI, to the extent available on EDGAR or otherwise provided
to the Lender as indicated on said Annex VI, collectively, the "Company's SEC
Documents").

                The Lender understands that its investment in the Securities
involves a high degree of risk.

                In connection with its purchase of the Securities, the Lender
has not relied on any statement or representation by the Company or the Finder
or any of their respective officers, directors and employees or any of their
respective attorneys or agents or the Finder, except as specifically set forth
herein. The Finder is a third party beneficiary of this provision.

                The Lender understands that no United States federal or state
agency or any other government or governmental agency has passed on or made any
recommendation or endorsement of the Securities.

                This Agreement and the other Transaction Agreements to which the
Lender is a party, and the transactions contemplated thereby, have been duly and
validly authorized, executed and delivered on behalf of the Lender and are valid
and binding agreements of the Lender enforceable in accordance with their
respective terms, subject as to enforceability to general principles of equity
and to bankruptcy, insolvency, moratorium and other similar laws affecting the
enforcement of creditors' rights generally.

                3.      COMPANY REPRESENTATIONS, ETC. The Company represents and
warrants to the Lender as of the date hereof and as of the Closing Date that,
except as otherwise provided in the Disclosure Letter or in the Company's SEC
Documents:

                A.      RIGHTS OF OTHERS AFFECTING THE TRANSACTIONS. There are
no preemptive rights of any shareholder of the Company, as such, to acquire the
Purchased Securities or the Shares. No party other has a currently exercisable
right of first refusal which would be applicable to any or all of the
transactions contemplated by the Transaction Agreements.

                B.      STATUS. The Company is a corporation duly organized,
validly existing and in good standing under the laws of the State of
Incorporation and has the requisite corporate power to own its properties and to
carry on its business as now being conducted. The Company is duly qualified as a
foreign corporation to do business and is in good standing in each jurisdiction
where the nature of the business conducted or property owned by it makes such
qualification necessary, other than those jurisdictions in which the failure to
so qualify would not have or result in a Material Adverse Effect. The Company
has registered its stock and is obligated to file reports pursuant to Section 12
or Section 15(d) of the Securities and Exchange Act of 1934, as amended (the
"1934 Act"). The Common Stock is quoted on the Principal Trading Market. The
Company has received no notice, either oral or written, with respect to the

                                                                               7
<PAGE>

continued eligibility of the Common Stock for such quotation on the Principal
Trading Market, and the Company has maintained all requirements on its part for
the continuation of such quotation.

                C.      AUTHORIZED SHARES.

        (i)     The authorized capital stock of the Company consists of (i)
300,000,000 shares of Common Stock, $.001 par value per share, of which
approximately 145,358,753 are outstanding as of December 13, 2004, and (ii)
5,000,000 shares of Preferred Stock, $.001 par value, of which none have been
designated.

        (ii)    There are no outstanding securities which are convertible into
shares of Common Stock, whether such conversion is currently exercisable or
exercisable only upon some future date or the occurrence of some event in the
future. If any such securities are listed on the Disclosure Letter, the number
or amount of each such outstanding convertible security and the conversion terms
are set forth in said Disclosure Letter.

        (iii)   All issued and outstanding shares of Common Stock have been duly
authorized and validly issued and are fully paid and non-assessable. The Company
has sufficient authorized and unissued shares of Common Stock as may be
necessary to effect the issuance of the Shares on the Closing Date.

        (iv)    The Shares shall have been duly authorized by all necessary
corporate action on the part of the Company, and, when issued on conversion of,
or in payment of interest on, the Debentures or upon exercise of the Warrants,
in each case in accordance with their respective terms, will have been duly and
validly issued, fully paid and non-assessable and will not subject the Holder
thereof to personal liability by reason of being such Holder.

                D.      TRANSACTION AGREEMENTS AND STOCK. This Agreement and
each of the other Transaction Agreements, and the transactions contemplated
hereby and thereby, have been duly and validly authorized by the Company, this
Agreement has been duly executed and delivered by the Company and this Agreement
is, and the Debentures, the Warrants and each of the other Transaction
Agreements, when executed and delivered by the Company, will be, valid and
binding obligations of the Company enforceable in accordance with their
respective terms, subject as to enforceability to general principles of equity
and to bankruptcy, insolvency, moratorium, and other similar laws affecting the
enforcement of creditors' rights generally.

                E.      NON-CONTRAVENTION. The execution and delivery of this
Agreement and each of the other Transaction Agreements by the Company, the
issuance of the Securities, and the consummation by the Company of the other
transactions contemplated by this Agreement, the Debentures, the Warrants and
the other Transaction Agreements do not and will not conflict with or result in
a breach by the Company of any of the terms or provisions of, or constitute a
default under (i) the certificate of incorporation or by-laws of the Company,
each as currently in effect, (ii) any indenture, mortgage, deed of trust, or
other material agreement or instrument to which the Company is a party or by
which it or any of its properties or assets are bound, including any listing
agreement for the Common Stock except as herein set forth, or (iii) to its
knowledge, any existing applicable law, rule, or regulation or any applicable
decree, judgment,

                                                                               8
<PAGE>

or order of any court, United States federal or state regulatory body,
administrative agency, or other governmental body having jurisdiction over the
Company or any of its properties or assets, except such conflict, breach or
default which would not have or result in a Material Adverse Effect.

                F.      APPROVALS. No authorization, approval or consent of any
court, governmental body, regulatory agency, self-regulatory organization, or
stock exchange or market or the shareholders of the Company is required to be
obtained by the Company for the issuance and sale of the Securities to the
Lender as contemplated by this Agreement, except such authorizations, approvals
and consents that have been obtained.

                G.      FILINGS. None of the Company's SEC Documents contained,
at the time they were filed, any untrue statement of a material fact or omitted
to state any material fact required to be stated therein or necessary to make
the statements made therein, in light of the circumstances under which they were
made, not misleading. Since December 1, 2003, the Company has timely filed all
requisite forms, reports and exhibits thereto required to be filed by the
Company with the SEC.

                H.      ABSENCE OF CERTAIN CHANGES. Since the Last Audited Date,
there has been no Material Adverse Effect, except as disclosed in the Company's
SEC Documents. Since the Last Audited Date, except as provided in the Company's
SEC Documents, the Company has not (i) incurred or become subject to any
material liabilities (absolute or contingent) except liabilities incurred in the
ordinary course of business consistent with past practices; (ii) discharged or
satisfied any material lien or encumbrance or paid any material obligation or
liability (absolute or contingent), other than current liabilities paid in the
ordinary course of business consistent with past practices; (iii) declared or
made any payment or distribution of cash or other property to shareholders with
respect to its capital stock, or purchased or redeemed, or made any agreements
to purchase or redeem, any shares of its capital stock; (iv) sold, assigned or
transferred any other material tangible assets, or canceled any material debts
owed to the Company by any third party or material claims of the Company against
any third party, except in the ordinary course of business consistent with past
practices; (v) waived any rights of material value, whether or not in the
ordinary course of business, or suffered the loss of any material amount of
existing business; (vi) made any increases in employee compensation, except in
the ordinary course of business consistent with past practices; or (vii)
experienced any material problems with labor or management in connection with
the terms and conditions of their employment.

                I.      FULL DISCLOSURE. To the Company's knowledge, there is no
fact known to the Company (other than facts known to the public generally or as
disclosed in the Company's SEC Documents) that has not been disclosed in writing
to the Lender that would reasonably be expected to have or result in a Material
Adverse Effect.

                J.      ABSENCE OF LITIGATION. There is no action, suit,
proceeding, inquiry or investigation before or by any court, public board or
body pending or, to the knowledge of the Company, threatened against or
affecting the Company before or by any governmental authority or
non-governmental department, commission, board, bureau, agency or
instrumentality or any other person, wherein an unfavorable decision, ruling or
finding would have a Material Adverse

                                                                               9
<PAGE>

Effect or which would adversely affect the validity or enforceability of, or the
authority or ability of the Company to perform its obligations under, any of the
Transaction Agreements. The Company is not aware of any valid basis for any such
claim that (either individually or in the aggregate with all other such events
and circumstances) could reasonably be expected to have a Material Adverse
Effect. There are no outstanding or unsatisfied judgments, orders, decrees,
writs, injunctions or stipulations to which the Company is a party or by which
it or any of its properties is bound, that involve the transaction contemplated
herein or that, alone or in the aggregate, could reasonably be expect to have a
Material Adverse Effect.

                K.      ABSENCE OF EVENTS OF DEFAULT. Except as set forth in
Section 3(e) hereof, no Event of Default (or its equivalent term), as defined in
the respective agreement to which the Company or its subsidiary is a party, and
no event which, with the giving of notice or the passage of time or both, would
become an Event of Default (or its equivalent term) (as so defined in such
agreement), has occurred and is continuing, which would have a Material Adverse
Effect.

                L.      ABSENCE OF CERTAIN COMPANY CONTROL PERSON ACTIONS OR
EVENTS. To the Company's knowledge, none of the following has occurred during
the past five (5) years with respect to a Company Control Person:

        (1) A petition under the federal bankruptcy laws or any state insolvency
        law was filed by or against, or a receiver, fiscal agent or similar
        officer was appointed by a court for the business or property of such
        Company Control Person, or any partnership in which he was a general
        partner at or within two years before the time of such filing, or any
        corporation or business association of which he was an executive officer
        at or within two years before the time of such filing;

        (2) Such Company Control Person was convicted in a criminal proceeding
        or is a named subject of a pending criminal proceeding (excluding
        traffic violations and other minor offenses);

        (3) Such Company Control Person was the subject of any order, judgment
        or decree, not subsequently reversed, suspended or vacated, of any court
        of competent jurisdiction, permanently or temporarily enjoining him
        from, or otherwise limiting, the following activities:

                (i) acting, as an investment advisor, underwriter, broker or
                dealer in securities, or as an affiliated person, director or
                employee of any investment company, bank, savings and loan
                association or insurance company, as a futures commission
                merchant, introducing broker, commodity trading advisor,
                commodity pool operator, floor broker, any other Person
                regulated by the Commodity Futures Trading Commission ("CFTC")
                or engaging in or continuing any conduct or practice in
                connection with such activity;

                (ii) engaging in any type of business practice; or

                                                                              10
<PAGE>

                (iii) engaging in any activity in connection with the purchase
                or sale of any security or commodity or in connection with any
                violation of federal or state securities laws or federal
                commodities laws;

        (4) Such Company Control Person was the subject of any order, judgment
        or decree, not subsequently reversed, suspended or vacated, of any
        federal or state authority barring, suspending or otherwise limiting for
        more than 60 days the right of such Company Control Person to engage in
        any activity described in paragraph (3) of this item, or to be
        associated with Persons engaged in any such activity; or

        (5) Such Company Control Person was found by a court of competent
        jurisdiction in a civil action or by the CFTC or SEC to have violated
        any federal or state securities law, and the judgment in such civil
        action or finding by the CFTC or SEC has not been subsequently reversed,
        suspended, or vacated.

                M.      NO UNDISCLOSED LIABILITIES OR EVENTS. To the Company's
knowledge, the Company has no liabilities or obligations other than those
disclosed in the Transaction Agreements or the Company's SEC Documents or those
incurred in the ordinary course of the Company's business since the Last Audited
Date, or which individually or in the aggregate, do not or would not have a
Material Adverse Effect. No event or circumstances has occurred or exists with
respect to the Company or its properties, business, operations, condition
(financial or otherwise), or results of operations, which, under applicable law,
rule or regulation, requires public disclosure or announcement prior to the date
hereof by the Company but which has not been so publicly announced or disclosed.
There are no proposals currently under consideration or currently anticipated to
be under consideration by the Board of Directors or the executive officers of
the Company which proposal would (x) change the articles or certificate of
incorporation or other charter document or by-laws of the Company, each as
currently in effect, with or without shareholder approval, which change would
reduce or otherwise adversely affect the rights and powers of the shareholders
of the Common Stock or (y) materially or substantially change the business,
assets or capital of the Company, including its interests in subsidiaries.

                N.      NO INTEGRATED OFFERING. Neither the Company nor any of
its Affiliates nor any Person acting on its or their behalf has, directly or
indirectly, at any time since December 1, 2003, made any offer or sales of any
security or solicited any offers to buy any security under circumstances that
would eliminate the availability of the exemption from registration under
Regulation D in connection with the offer and sale of the Securities as
contemplated hereby.

                O.      DILUTION. The number of shares issuable on conversion of
the Debentures, upon exercise of the Warrants or pursuant to the other terms of
the Transaction Agreements may have a dilutive effect on the ownership interests
of the other shareholders (and Persons having the right to become shareholders)
of the Company. The Company's executive officers and directors have studied and
fully understand the nature of the Securities being sold hereby and recognize
that they have such a potential dilutive effect. The board of directors of the
Company has concluded, in its good faith business judgment, that such issuance
is in the best interests of the Company. The Company specifically acknowledges
that its obligation to issue the Conversion Shares upon conversion of the
Debentures, the Warrant Shares upon exercise of the Warrants or the Payment
Shares as provided in the Registration Rights Agreement is binding

                                                                              11
<PAGE>

upon the Company and enforceable regardless of the dilution such issuance may
have on the ownership interests of other shareholders of the Company, and the
Company will honor such obligations, including honoring every Notice of
Conversion (as contemplated by the Debentures), every Notice of Exercise (as
contemplated by the Warrants), and every demand for Payment Shares (as
contemplated by the Registration Rights Agreement), unless the Company is
subject to an injunction (which injunction was not sought by the Company)
prohibiting the Company from doing so.

                P.      FEES TO BROKERS, FINDERS AND OTHERS. Except for payment
of the fees to the Finder's Compensation (as defined below) to the Finder,
payment of which is the sole responsibility of the Company, the Company has
taken no action which would give rise to any claim by any Person for brokerage
commission, finder's fees or similar payments by Lender relating to this
Agreement or the transactions contemplated hereby. Lender shall have no
obligation with respect to such fees or with respect to any claims made by or on
behalf of other Persons for fees of a type contemplated in this paragraph that
may be due in connection with the transactions contemplated hereby. The Company
shall indemnify and hold harmless each of Lender, its employees, officers,
directors, agents, and partners, and their respective Affiliates, from and
against all claims, losses, damages, costs (including the costs of preparation
and attorney's fees) and expenses suffered in respect of any such claimed or
existing fees, as and when incurred. The term "Finder's Compensation" means, in
connection with the consummation of the transactions contemplated by this
Agreement, the consideration contemplated by the Joint Escrow Instructions.

                Q.      DISCLOSURE. All information relating to or concerning
the Company set forth in this Agreement, in the Company's public filings with
the SEC, or provided to the Lender in connection with the transactions
contemplated hereby is true and correct in all material respects and have not
omitted to state any material fact necessary in order to make the statements
made, in light of the circumstances under which they were made, not misleading.
No event or circumstance has occurred or exists with respect to the Company or
its business, properties, prospects, operations or financial conditions, which
under applicable law, rule or regulation, requires public disclosure or
announcement by the Company.

                R.      CONFIRMATION. The Company confirms that all statements
of the Company contained herein shall survive acceptance of this Agreement by
the Lender for a period of three (3) years from the Closing Date. The Company
agrees that, if, to the knowledge of the Company, any events occur or
circumstances exist prior to the Closing Date which would make any of the
Company's representations, warranties, agreements or other information set forth
herein materially untrue or materially inaccurate as of such date, the Company
shall immediately notify the Lender (directly or through its counsel, if any)
and the Escrow Agent in writing prior to such date of such fact, specifying
which representation, warranty or covenant is affected and the reasons therefor.

                4.      CERTAIN COVENANTS AND ACKNOWLEDGMENTS.

                A.      TRANSFER RESTRICTIONS.

                                                                              12
<PAGE>

                (i)     The Lender acknowledges that (1) the Securities have not
been and are not being registered under the provisions of the 1933 Act and,
except as provided in the Registration Rights Agreement or otherwise included in
an effective registration statement, the Shares have not been and are not being
registered under the 1933 Act, and may not be transferred unless (A)
subsequently registered thereunder or (B) the Lender shall have delivered to the
Company an opinion of counsel, reasonably satisfactory in form, scope and
substance to the Company, to the effect that the Securities to be sold or
transferred may be sold or transferred pursuant to an exemption from such
registration; (2) any sale of the Securities made in reliance on Rule 144
promulgated under the 1933 Act may be made only in accordance with the terms of
said Rule and further, if said Rule is not applicable, any resale of such
Securities under circumstances in which the seller, or the Person through whom
the sale is made, may be deemed to be an underwriter, as that term is used in
the 1933 Act, may require compliance with some other exemption under the 1933
Act or the rules and regulations of the SEC thereunder; and (3) neither the
Company nor any other Person is under any obligation to register the Securities
(other than pursuant to the Registration Rights Agreement) under the 1933 Act or
to comply with the terms and conditions of any exemption thereunder.

                (ii)    In addition to the foregoing, and not in lieu thereof,
the Lender agrees that, without the express written consent of the Company in
each instance, it will not transfer any of the Purchased Securities to any
Person (x) which is known to the Lender to be in substantially the same business
as the Company or which the Company reasonably identifies as a competitor, or
(y) which is known to be a subsidiary or affiliate of such a Person.

                B.      RESTRICTIVE LEGEND. The Lender acknowledges and agrees
that, until such time as the relevant Shares have been registered under the 1933
Act, as contemplated by the Registration Rights Agreement, and sold in
accordance with an effective Registration Statement or otherwise in accordance
with another effective registration statement, or until such Shares can
otherwise be sold without restriction, whichever is earlier, the certificates
and other instruments representing any of the Securities shall bear a
restrictive legend in substantially the following form (and a stop-transfer
order may be placed against transfer of any such Securities):

    THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
    1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE
    SOLD OR OFFERED FOR SALE IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
    STATEMENT FOR THE SECURITIES OR AN OPINION OF COUNSEL OR OTHER EVIDENCE
    ACCEPTABLE TO THE COMPANY THAT SUCH REGISTRATION IS NOT REQUIRED.

                C.      FILINGS. The Company undertakes and agrees to make all
necessary filings in connection with the sale of the Securities to the Lender
under any United States laws and regulations applicable to the Company, or by
any domestic securities exchange or trading market, and to provide a copy
thereof to the Lender promptly after such filing. Reference is made to Section
4(j) below.

                D.      REPORTING STATUS. So long as the Lender beneficially
owns any of the Purchased Securities and for at least twenty (20) Trading Days
thereafter, the Company shall file all reports required to be filed with the SEC
pursuant to Section 13 or 15(d) of the 1934 Act,

                                                                              13
<PAGE>

shall take all reasonable action under its control to ensure that adequate
current public information with respect to the Company, as required in
accordance with Rule 144(c)(2) of the 1933 Act, is publicly available, and shall
not terminate its status as an issuer required to file reports under the 1934
Act even if the 1934 Act or the rules and regulations thereunder would permit
such termination. The Company will take all reasonable action under its control
to maintain the continued listing and quotation and trading of its Common Stock
(including, without limitation, all Registrable Securities) on the Principal
Trading Market or a listing on the NASDAQ/Small Cap or National Markets and, to
the extent applicable to it, will comply in all material respects with the
Company's reporting, filing and other obligations under the by-laws or rules of
the Principal Trading Market and/or the National Association of Securities
Dealers, Inc., as the case may be, applicable to it at least through the date
which is sixty (60) days after the later of the date on which (x) all of the
Debentures have been converted or have been paid in full or (y) all of the
Warrants have been exercised or have expired.

                E.      USE OF PROCEEDS. The Company will use the net proceeds
received hereunder (excluding amounts paid as contemplated by the Joint Escrow
Instructions) for general corporate purposes.

                F.      WARRANTS.

                (i)     The Company agrees to issue to the Lender on the Closing
Date a transferable warrant (each, a "Warrant" and, collectively, the
"Warrants") for the purchase the a number of shares of Common Stock equal to one
hundred percent (100%) of the Issue Date Conversion Shares at an exercise price
of $0.50 per share (subject to adjustment as provided in the Warrant). The
Warrants will be exercisable commencing on the Commencement Date specified in
the Warrants and expire on the date which is on the last day of the calendar
month in which the third annual anniversary of the Closing Date occurs. Except
as specified above, each Warrant shall generally be in the form annexed hereto
as ANNEX V.

                (ii)    The Warrant Shares shall be subject to the provisions of
the Registration Rights Agreement.

                G.      CERTAIN AGREEMENTS.

                (i)     (A)     The term "Lower Price Transaction" means a New
Transaction offered or consummated during the period (the "New Transaction
Period") from the Closing Date and continuing through and including the Final
Lock-up Date (as defined below), where (I) either the lowest purchase price of
any shares of the New Common Stock contemplated in the New Transaction or the
lowest conversion price which would be applicable under the terms of the New
Transaction is, or by its terms or by an existing understanding of the Company
and the New Investor, could subsequently be adjusted or revised to be, below the
Conversion Price then in effect (such purchase price or conversion price, in
each case, subject to adjustment in the same manner as the Fixed Conversion
Price of the Debentures is adjusted, other than as a result of the application
of this Section 4(g)) and/or (II) the lowest Exercise Price of any New
Transaction Warrants (as defined below) is, or by its terms or by an existing
understanding of the Company and the New Investor, could subsequently be
adjusted or revised to be, lower than the then effective Exercise Price of the
Warrants (such Exercise Price, in each case, subject to adjustment

                                                                              14
<PAGE>

in the same
manner as the initial Exercise Price of the Warrant is adjusted, other than as a
result of the application of this Section 4(g)).

                        (B)     The term "Final Lock-up Date" means the date
which is two hundred seventy (270) days after the Effective Date, but not
counting for such purposes the days, if any, during which sale of Registrable
Securities was suspended after the Effective Date.1

                        (C)     The term "Alternative Warrant Percentage" means
(x) the number of shares which are eligible to be purchased under the warrant,
option or other right (howsoever denominated) issued in the New Transaction
("New Transaction Warrants"), divided by (y) the aggregate of the shares of New
Common Stock issued or issuable in such transaction (excluding the shares
issuable on exercise of the New Transaction Warrants).

                (ii)    The Company covenants and agrees that, if there is a
Lower Price Transaction during the New Transaction Period, then

        (A) the Conversion Price on any Unconverted Debentures (as defined in
        the Debentures) shall be adjusted to an amount (the "Adjusted Conversion
        Price") equal to the lower of (1) the lowest fixed purchase price of any
        shares of the New Common Stock contemplated in the Lower Price
        Transaction or (2) the lowest conversion price which would be applicable
        under the terms of the Lower Price Transaction (and in each such case,
        if no minimum purchase price or conversion price, as the case may be, is
        set, it shall be assumed that such minimum purchase price or conversion
        price is $.01);

        (B) the number of shares which may be purchased on exercise of the
        outstanding Warrants shall be adjusted to equal the higher of (1) the
        then outstanding number of Warrant Shares which would then be issuable
        upon the exercise in full of such Warrants (without regard to any
        limitations which may then restrict the Holder's full exercise of such
        Warrant at any time), as in effect immediately prior to the relevant New
        Transaction (the "Outstanding Warrant Shares" ), or (2) the number of
        shares determined by

                (x) multiplying the fraction, of which the numerator is the
                Outstanding Warrant Shares and the denominator is the original
                number of Warrant Shares issuable on exercise of such Warrant on
                the Closing Date (without regard to any limitations which may
                then restrict the Holder's full exercise of such Warrant at any
                time; the "Original Warrant Shares"), by

                (y) the number which is equal to (I) the higher of (aa) one
                hundred percent (100%) or (bb) the Alternative Warrant
                Percentage, multiplied by (II) the Purchase Price, divided by
                the lower of (a) the Conversion Price or (b) the

----------------------
1       By way of illustration: If the sale of Registrable Securities was
suspended for ten (10) days in the interim, the applicable Final Lock-up Date
will be two hundred eighty (280) days after the Effective Date. If on the 278th
day after the Effective Date, the sale of Registrable Securities was suspended
again for five (5) days, the Final Lock-up Date will be two hundred eighty-five
(285) days after the Effective Date.

                                                                              15
<PAGE>

                Adjusted Conversion Price for the initial closing date of the
                relevant New Transaction; and

        (C) the Exercise Price on all unexercised Warrants shall be adjusted to
        equal the lowest of (1) the then existing Exercise Price, (2) the lowest
        Exercise Price applicable to the Lower Price Transaction, or (3) two
        hundred percent (200%) of the Adjusted Conversion Price.

                (iii)   Anything in the foregoing provisions of this Section
4(g) to the contrary notwithstanding, if, during the New Transaction Period, the
Company enters into a New Transaction, the following provisions shall apply:

        (A) whether or not such New Transaction is a Lower Price Transaction, if
        the provisions applicable to the convertible preferred stock,
        convertible debenture or similar instrument (howsoever denominated), if
        any, of the New Transaction are more beneficial to the holder of such
        instrument than the corresponding terms applicable to the Debentures
        (whether provided in the Debentures or in any of the other Transaction
        Agreements) or in or to the Warrant, as the case may be, or if the terms
        which are beneficial to the Company in the relevant Transaction
        Agreements are not included in the corresponding instrument in the New
        Transaction, then, unless waived by the Holder, the terms of the
        Transaction Agreements applying to the then outstanding Unconverted
        Debentures or then outstanding unexercised Warrant, as the case may be,
        shall be modified to reflect similar terms (based, for such outstanding
        Debentures and for such outstanding Warrants, on the Closing Date);
        provided, however, that nothing in this provision shall be read to mean
        that the Purchased Securities shall be changed to any other form of
        security; and

        (B) if the New Transaction is other than a Lower Price Transaction,
        then, if the Alternative Warrant Percentage is greater than one hundred
        percent (100%), the Company shall issue to the Holder additional
        warrants ("Additional Warrants") for the purchase of the number of
        shares equal to (1) (x) the Alternative Warrant Percentage, multiplied
        by (y) the Purchase Price divided by the lower of the Conversion Price
        or the Adjusted Conversion Price, if any, multiplied by (2) a fraction,
        of which the numerator is the Outstanding Warrant Shares and the
        denominator is Original Warrant Shares; and the terms of such Additional
        Warrants (including, but not limited, to term of exercisability,
        exercise price, manner and limitations, if any, on exercise,
        registration rights) shall be the same as the applicable New Transaction
        Warrants issued in such New Transaction.

                (iv)    Nothing in the foregoing provisions reflects either an
obligation on the part of any Lender to participate in any New Transaction or a
limitation on any Lender from participating in any New Transaction.

                (v)     Any of the foregoing provisions of this Section 4(g) or
any other provision of this Agreement or any of the other Transaction Agreements
to the contrary notwithstanding, the Company shall not engage in any offers,
sales or other transactions of its securities which would adversely affect the
exemption from registration available for the transactions contemplated by the
Transaction Agreements.

                                                                              16
<PAGE>

                H.      COMPANY PRINCIPAL AGREEMENTS. The Company hereby agrees
that, prior to the Closing Date, the Company will cause each of the persons
named at the head of ANNEX VII attached hereto (each, a "Company Principal"),
each of whom is a director or a principal officer or employee of the Company,
and certain persons who are related to or controlled by such Company Principal,
to execute and deliver an agreement (each, a "Company Principal's Agreement")
regarding limitations on the sale or other disposition of such Company
Principal's shares of the Company's Common Stock (or instruments convertible
into or exercisable for such shares). Each Company Principal's Agreement shall
be substantially in the form set forth in ANNEX VII attached hereto.

                H.      AVAILABLE SHARES. The Company shall have at all times
authorized and reserved for issuance, free from preemptive rights, a number of
shares (the "Reserved Amount") at least equal to

        (i) until the Final Lock-up Date, one hundred twenty-five percent
        (125%), and

        (ii) thereafter, one hundred percent (100%)

of the sum of (x) the number of shares of Common Stock issuable as may be
required to satisfy the conversion rights of the Holders of principal on all
outstanding Convertible Debentures plus interest thereon through the Maturity
Date, plus (y) the number of shares issuable upon exercise of all outstanding
Warrants held by all Holders (in each case, whether such Convertible Debentures
or Warrants were originally issued to the Holder, the Lender or to any other
party). For the purposes of such calculations, the Company should assume that
all Debentures and all Warrants, including without limitation the Additional
Warrants, were then issued and exercisable, in each case without regard to any
restrictions which might limit any Holder's right to convert any of the
Debentures or to exercise any of the Warrants held by any Holder.

                J.      PUBLICITY, FILINGS, RELEASES, ETC. Each of the parties
agrees that it will not disseminate any information relating to the Transaction
Agreements or the transactions contemplated thereby, including issuing any press
releases, holding any press conferences or other forums, or filing any reports
(collectively, "Publicity"), without giving the other party reasonable advance
notice and an opportunity to comment on the contents thereof. Neither party will
include in any such Publicity any statement or statements or other material to
which the other party reasonably objects. In furtherance of the foregoing, the
Company will provide to the Lender drafts of the applicable text of any filing
intended to be made with the SEC which refers to the Transaction Agreements or
the transactions contemplated thereby as soon as practicable (but at least three
(3) business days before such filing will be made) and will not include in such
filing any statement or statements or other material to which the other party
reasonably objects. Notwithstanding the foregoing, each of the parties hereby
consents to the inclusion of the text of the Transaction Agreements in filings
made with the SEC (but any descriptive text accompanying or part of such filing
shall be subject to the other provisions of this paragraph). Notwithstanding,
but subject to, the foregoing provisions of this Section 4(j), the Company will,
after the Closing Date, promptly issue a press release and file a Current Report
on Form 8-K or, if appropriate, a quarterly or annual report on the appropriate
form, referring to the transactions contemplated by the Transaction Agreements.

                                                                              17
<PAGE>

                K.      INDEPENDENT NATURE OF LENDERS' OBLIGATIONS AND RIGHTS.
The obligations of each Lender under the Transaction Agreements are several and
not joint with the obligations of any other Lender, and no Lender shall be
responsible in any way for the performance of the obligations of any Other
Lender under any one or more of the Transaction Agreements. The decision of each
Lender or Other Lender to purchase Purchased Securities pursuant to the
Transaction Agreements has been made by such Lender independently of any Other
Lender. Nothing contained herein or in any Transaction Agreement, and no action
taken by any Lender pursuant thereto, shall be deemed to constitute any two or
more Lenders as a partnership, an association, a joint venture or any other kind
of entity, or create a presumption that the Lenders are in any way acting in
concert or as a group with respect to such obligations or the transactions
contemplated by the Transaction Agreements. Each Lender acknowledges that no
Other Lender has acted as agent for such Lender in connection with making its
investment hereunder and that no Lender will be acting as agent of such Other
Lender in connection with monitoring its investment in the Purchased Securities
or enforcing its rights under the Transaction Agreements. Each Lender shall be
entitled to independently protect and enforce its rights, including without
limitation the rights arising out of this Agreement or out of the other
Transaction Agreements, and it shall not be necessary for any Other Lender to be
joined as an additional party in any proceeding for such purpose. The Company
acknowledges that each of the Lenders has been provided with the same
Transaction Agreements for the purpose of closing a transaction with multiple
Lenders and not because it was required or requested to do so by any Lender.

                L.      EQUAL TREATMENT OF LENDERS. No consideration shall be
offered or paid to any person to amend or consent to a waiver or modification of
any provision of any of the Transaction Agreements unless the same consideration
is also offered to all of the parties to the Transaction Agreements.

                M.      INDEPENDENT INVESTMENT DECISION. No Lender has agreed to
act with any Other Lender for the purpose of acquiring, holding, voting or
disposing of the Securities purchased hereunder for purposes of Section 13(d)
under the Exchange Act, and each Lender is acting independently with respect to
its investment in the Securities. The decision of each Lender to purchase
Purchased Securities pursuant to this Agreement has been made by such Lender
independently of any other purchase and independently of any information,
materials, statements or opinions as to the business, affairs, operations,
assets, properties, liabilities, results of operations, condition (financial or
otherwise) or prospects of the Company or its subsidiaries which may have made
or given by any Other Lender or by any agent or employee of any Other Lender,
and no Lender or any of its agents or employees shall have any liability to any
Other Lender (or any other person) relating to or arising from any such
information, materials, statements or opinions.

                5.      TRANSFER AGENT INSTRUCTIONS.

                The Company warrants that, with respect to the Securities, other
than the stop transfer instructions to give effect to Section 4(a) hereof, it
will give the Transfer Agent no instructions inconsistent with instructions to
issue Common Stock from time to time upon conversion of the Debentures or
exercise of the Warrants or in connection with the issuance of Payment Shares,
as may be applicable from time

                                                                              18
<PAGE>

to time, in such amounts as specified from time to time by the Company to the
Transfer Agent, bearing the restrictive legend specified in Section 4(b) of this
Agreement prior to registration of the Shares under the 1933 Act, registered in
the name of the Lender or its nominee and in such denominations to be specified
by the Holder in connection therewith. Except as so provided, the Shares shall
otherwise be freely transferable on the books and records of the Company as and
to the extent provided in this Agreement and the other Transaction Agreements.
Nothing in this Section shall affect in any way the Lender's obligations and
agreement to comply with all applicable securities laws upon resale of the
Securities. If the Lender provides the Company with an opinion of counsel
reasonably satisfactory to the Company that registration of a resale by the
Lender of any of the Securities in accordance with clause (1)(B) of Section 4(a)
of this Agreement is not required under the 1933 Act, the Company shall (except
as provided in clause (2) of Section 4(a) of this Agreement) permit the transfer
of the Securities and, in the case of the Conversion Shares, the Warrant Shares
or the Payment Shares, as may be applicable, promptly instruct the Transfer
Agent to issue one or more certificates for Common Stock without legend in such
name and in such denominations as specified by the Lender.

                (i)     The Company understands that a delay in the issuance of
the Shares of Common Stock beyond the Delivery Date (as defined in the
Debenture) could result in economic loss to the Holder. As compensation to the
Holder for such loss, the Company agrees to pay late payments to the Holder for
late issuance of Shares upon conversion in accordance with the following
schedule (where "No. Business Days Late" refers to the number of Trading Days
which is beyond two (2) Trading Days after the Delivery Date):2

                                           Late Payment For Each $10,000
                                              of Principal or Interest
         No. Business Days Late                   Being Converted
         ---------------------------------------------------------------

                  1                                    $100
                  2                                    $200
                  3                                    $300
                  4                                    $400
                  5                                    $500
                  6                                    $600
                  7                                    $700
                  8                                    $800
                  9                                    $900
                  10                                   $1,000
                  >10                    $1,000 + $200 for each Business
                                            Day Late beyond 10 days

--------------------
2       Example: Notice of Conversion is delivered on Monday, August 1, 2005.
The Delivery Date would be Monday, August 8 (the fifth Trading Day after such
delivery). If the certificate is delivered by Wednesday, August 10 (2 Trading
Days after the Delivery Date), no payment under this provision is due. If the
certificates are delivered on August 11, that is 1 "Trading Day Late" in the
table below; if delivered on August 18, that is 6 "Trading Days Late" in the
table.

                                                                              19
<PAGE>

The Company shall pay any payments incurred under this Section in immediately
available funds upon demand. Nothing herein shall limit the Holder's right to
pursue actual damages for the Company's failure to issue and deliver the
Conversion Certificates to the Holder within a reasonable time. Furthermore, in
addition to any other remedies which may be available to a Holder, in the event
that the Company fails for any reason to effect delivery of such Conversion
Certificates within seven (7) Trading Days after the Delivery Date, the
Converting Holder will be entitled to revoke the relevant Notice of Conversion
or the effect of the Mandatory Conversion Date by delivering a notice to such
effect to the Company whereupon the Company and the Converting Holder shall each
be restored to their respective positions immediately prior to delivery of such
Notice of Conversion or Mandatory Conversion Date; PROVIDED, HOWEVER, that any
payments contemplated by this Section 5(b) of this Agreement which have accrued
through the date of such revocation notice shall remain due and owing to the
Converting Holder notwithstanding such revocation.

                (ii)    If, by the relevant Delivery Date, the Company fails for
any reason to deliver the Conversion Certificates and after such Delivery Date,
the Converting Holder purchases, in an arm's-length open market transaction or
otherwise, shares of Common Stock (the "Covering Shares") in order to make
delivery in satisfaction of a sale of Common Stock by the Converting Holder (the
"Sold Shares"), which delivery such Converting Holder anticipated to make using
the Shares to be issued upon such conversion (a "Buy-In"), the Converting Holder
shall have the right, in addition to and not in lieu of all other amounts
contemplated in other provisions of the Transaction Agreements, including, but
not limited to, the provisions of the immediately preceding Section 5(b)(i)),
the Buy-In Adjustment Amount (as defined below). The "Buy-In Adjustment Amount"
is the amount equal to the number of Sold Shares multiplied by the excess, if
any, of (x) the Converting Holder's total purchase price per share (including
brokerage commissions, if any) for the Covering Shares over (y) the net proceeds
per share (after brokerage commissions, if any) received by the Converting
Holder from the sale of the Sold Shares. The Company shall pay the Buy-In
Adjustment Amount to the Converting Holder in immediately available funds
immediately upon demand by the Converting Holder. By way of illustration and not
in limitation of the foregoing, if the Converting Holder purchases shares of
Common Stock having a total purchase price (including brokerage commissions) of
$11,000 to cover a Buy-In with respect to shares of Common Stock it sold for net
proceeds of $10,000, the Buy-In Adjustment Amount which Company will be required
to pay to the Converting Holder will be $1,000.

             In lieu of delivering physical certificates representing the Common
Stock issuable upon conversion of the Debenture or exercise of a Warrant or at
the request of the Holder with respect to any Shares previously issued, provided
the Transfer Agent is participating in the Depository Trust Company ("DTC") Fast
Automated Securities Transfer program, upon request of the Holder and its
compliance with the provisions contained in this paragraph, so long as the
certificates therefor do not bear a legend and the Holder thereof is not
obligated to return such certificate for the placement of a legend thereon, the
Company shall use its best efforts to cause the Transfer Agent to electronically
transmit to the Holder the Common Stock issuable upon conversion of the
Debenture or exercise of the Warrant or in replacement of any Shares previously
issued by crediting the account of Holder's Prime Broker with DTC through its
Deposit Withdrawal Agent Commission system.

                                                                              20
<PAGE>

             The Company shall assume any fees or charges of the Transfer Agent
or Company counsel regarding (i) the removal of a legend or stop transfer
instructions with respect to Registrable Securities, and (ii) the issuance of
certificates or DTC registration to or in the name of the Holder or the Holder's
designee or to a transferee as contemplated by an effective Registration
Statement. Notwithstanding the foregoing, it is the obligation of the Holder to
obtain formal requirements, such as medallion guarantee, for such issuances.

             The Company will authorize the Transfer Agent to give information
relating to the Company directly to the Holder or the Holder's representatives
upon the request of the Lender or any such representative, to the extent such
information relates to (i) the status of shares of Common Stock issued or
claimed to be issued to the Holder in connection with a Notice of Conversion or
a Notice of Exercise, or (ii) the aggregate number of outstanding shares of
Common Stock of all shareholders (as a group and not individually) as of a
current or other specified date. At the request of the Holder, the Company will
provide the Holder with a copy of the authorization so given to the Transfer
Agent.

                6.      CLOSING DATES.

                A.      The Closing Date shall occur on the date which is the
first Trading Day after each of the conditions contemplated by Sections 7 and 8
hereof shall have either been satisfied or been waived by the party in whose
favor such conditions run.

                The closing of the purchase and issuance of the Purchased
Securities shall occur on the Closing Date at the offices of the Escrow Agent.

                (i)     If the Closing Date does not occur by the close of
business on January 31, 2005, then at any time after that date and prior to the
date on which the Closing Date occurs, the Lender may, by written notice to the
Escrow Agent (a "Cancellation Notice") with a copy to the Company, request the
return by the Escrow Agent to the Lender of the Purchase Price. Upon the Escrow
Agent's receipt of such Cancellation Notice, if the Closing Date has not
occurred prior to 5 PM (Eastern Time) of the Trading Day following such receipt
by the Escrow Agent, the Lender shall have no further obligations under this
Agreement, including, without limitation, the obligation to pay any part of the
Purchase Price, and the Escrow Agent shall return the Lender's Escrow Funds to
the Lender and the Certificates issued to the Lender being held as part of the
Escrow Property to the Company.

                (ii)    If the Escrow Agent receives a Cancellation Notice from
a Lender, but the Closing Date occurs prior to 5 PM (Eastern Time) of Trading
Day following the Escrow Agent's receipt of such Cancellation Notice, the
Cancellation Notice shall be deemed null and void ab initio.

                Notwithstanding anything to the contrary contained herein, the
Escrow Agent will be authorized to release the Escrow Funds to the Company and
to others and to release the other Escrow Property on the Closing Date upon
satisfaction of the conditions set forth in Sections 7 and 8 hereof and as
provided in the Joint Escrow Instructions.

                                                                              21
<PAGE>

                7.      CONDITIONS TO THE COMPANY'S OBLIGATION TO SELL.

                The Lender understands that the Company's obligation to sell the
Purchased Securities to the Lender pursuant to this Agreement on the Closing
Date is conditioned upon:

                The execution and delivery of this Agreement by the Lender on or
before the Closing Date;

                Delivery by the Lender to the Escrow Agent by the Closing Date
of good funds as payment in full of an amount equal to the Purchase Price in
accordance with this Agreement;

                The accuracy on such Closing Date of the representations and
warranties of the Lender contained in this Agreement, each as if made on such
date, and the performance by the Lender on or before such date of all covenants
and agreements of the Lender required to be performed on or before such date;
and

                There shall not be in effect any law, rule or regulation
prohibiting or restricting the transactions contemplated hereby, or requiring
any consent or approval which shall not have been obtained.

                8.      CONDITIONS TO THE LENDER'S OBLIGATION TO PURCHASE.

                The Company understands that the Lender's obligation to purchase
the Purchased Securities on the Closing Date is conditioned upon:

                The execution and delivery of this Agreement and the other
Transaction Agreements by the Company on or before the Closing Date;

                The delivery by the Company to the Escrow Agent of originals of
each of the Certificates in accordance with this Agreement;

                C.      Delivery by the Company to the Escrow Agent of written
confirmation that there are no changes to the Disclosure Letter, a copy of which
shall be attached to such confirmation;

                Delivery by the Company to the Escrow Agent of the executed
Company Principal's Agreements from each Company Principal and the related
Principals (as defined in each Company Principal's Agreement) of such Company
Principal;

                E.      On such Closing Date, each of the Transaction Agreements
executed by the Company on or before such date shall be in full force and effect
and the Company shall not be in default thereunder;

                The accuracy in all material respects on such Closing Date of
the representations and warranties of the Company contained in this Agreement,
each as if made on such date, and the performance by the Company on or before
such date of all covenants and agreements of the Company required to be
performed on or before such date;

                                                                              22
<PAGE>

                The Lender shall have received an opinion of counsel for the
Company, dated such Closing Date, in form, scope and substance reasonably
satisfactory to the Lender, substantially to the effect set forth in ANNEX III
attached hereto;

                There shall not be in effect any law, rule or regulation
prohibiting or restricting the transactions contemplated hereby, or requiring
any consent or approval which shall not have been obtained; and

                From and after the date hereof to and including such Closing
Date, each of the following conditions will remain in effect: (i) the trading of
the Common Stock shall not have been suspended by the SEC or on the Principal
Trading Market; (ii) trading in securities generally on the Principal Trading
Market shall not have been suspended or limited; (iii), no minimum prices shall
been established for securities traded on the Principal Trading Market; and (iv)
there shall not have been any material adverse change in any financial market.

                9.      JURY TRIAL WAIVER. The Company and the Lender hereby
waive a trial by jury in any action, proceeding or counterclaim brought by
either of the Parties hereto against the other in respect of any matter arising
out or in connection with the Transaction Agreements.

                10.     GOVERNING LAW: MISCELLANEOUS.

                This Agreement shall be governed by and interpreted in
accordance with the laws of the State of New York for contracts to be wholly
performed in such state and without giving effect to the principles thereof
regarding the conflict of laws. Each of the parties consents to the exclusive
jurisdiction of the federal courts whose districts encompass any part of the
County of New York or the state courts of the State of New York sitting in the
County of New York in connection with any dispute arising under this Agreement
or any of the other Transaction Agreements and hereby waives, to the maximum
extent permitted by law, any objection, including any objection based on FORUM
NON CONVENIENS, to the bringing of any such proceeding in such jurisdictions. To
the extent determined by such court, the Company shall reimburse the Lender for
any reasonable legal fees and disbursements incurred by the Lender in
enforcement of or protection of any of its rights under any of the Transaction
Agreements.

                Failure of any party to exercise any right or remedy under this
Agreement or otherwise, or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.

                This Agreement shall inure to the benefit of and be binding upon
the successors and assigns of each of the parties hereto.

                All pronouns and any variations thereof refer to the masculine,
feminine or neuter, singular or plural, as the context may require.

                A facsimile transmission of this signed Agreement shall be legal
and binding on all parties hereto.

                                                                              23
<PAGE>

                This Agreement may be signed in one or more counterparts, each
of which shall be deemed an original.

                The headings of this Agreement are for convenience of reference
and shall not form part of, or affect the interpretation of, this Agreement.

                If any provision of this Agreement shall be invalid or
unenforceable in any jurisdiction, such invalidity or unenforceability shall not
affect the validity or enforceability of the remainder of this Agreement or the
validity or enforceability of this Agreement in any other jurisdiction.

                This Agreement may be amended only by an instrument in writing
signed by the party to be charged with enforcement thereof.

                This Agreement supersedes all prior agreements and
understandings among the parties hereto with respect to the subject matter
hereof.

                NOTICES. Any notice required or permitted hereunder shall be
given in writing (unless otherwise specified herein) and shall be deemed
effectively given on the earliest of

        (a) the date delivered, if delivered by personal delivery as against
        written receipt therefor or by confirmed facsimile transmission,

        (b) the seventh business day after deposit, postage prepaid, in the
        United States Postal Service by registered or certified mail, or

        (c) the third business day after mailing by domestic or international
        express courier, with delivery costs and fees prepaid, in each case,
        addressed to each of the other parties thereunto entitled at the
        following addresses (or at such other addresses as such party may
        designate by ten (10) days' advance written notice similarly given to
        each of the other parties hereto):

COMPANY:        At the address set forth at the head of this Agreement.
                Attn: Chief Executive Officer
                Telephone No.: (617) 332-0004
                Telecopier No.: (617) 332-7260

                with a copy to:

                Aboudi & Brounstein
                Attn: David Aboudi, Esq.
                Rechov Gavish 3, POB 2432
                Kfar Saba Industrial Zone 44641 Israel
                Telephone No.: (011-972-9) 764-4833
                Telecopier No.: (011-972-9) 764-4834

                                                                              24
<PAGE>

LENDER:         At the address set forth on the signature page of this
                Agreement.

                with a copy to:

                Krieger & Prager LLP, Esqs.
                39 Broadway
                Suite 1440
                New York, NY 10006
                Attn: Ronald J. Nussbaum, Esq.
                Telephone No.: (212) 363-2900
                Telecopier No.  (212) 363-2999

ESCROW AGENT:   Krieger & Prager LLP, Esqs.
                39 Broadway
                Suite 1440
                New York, NY 10006
                Attn: Samuel Krieger, Esq.
                Telephone No.: (212) 363-2900
                Telecopier No.  (212) 363-2999

                12.     SURVIVAL OF REPRESENTATIONS AND WARRANTIES. The
Company's and the Lender's representations and warranties herein shall survive
the execution and delivery of this Agreement and the delivery of the
Certificates and the payment of the Purchase Price, for a period of three (3)
years after the Closing Date and shall inure to the benefit of the Lender and
the Company and their respective successors and assigns.

                   [BALANCE OF PAGE INTENTIONALLY LEFT BLANK.]

                                                                              25
<PAGE>

                 [SECURITIES PURCHASE AGREEMENT SIGNATURE PAGE]

        IN WITNESS WHEREOF, with respect to the Purchase Price specified below,
each the undersigned represents that the foregoing statements made by it above
are true and correct and that it has caused this Agreement to be duly executed
on its behalf (if an entity, by one of its officers thereunto duly authorized)
as of the date first above written.

PURCHASE PRICE:                                      $________________________

                                                      LENDER:

__________________________________            __________________________________
Address                                       Printed Name of Lender

__________________________________

                                              By: ______________________________
Telecopier No. _________________              (Signature of Authorized Person)

                                              __________________________________
__________________________________            Printed Name and Title
Jurisdiction of Incorporation
or Organization

                                    COMPANY:

AMBIENT CORPORATION

By:          /s/ John J. Joyce

Title:       Chief Executive Officer

                                                                              26

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00076-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00076-of-00352.parquet"}]]