Document:

Exhibit 10.4

                              CONSULTING AGREEMENT

      This  Consulting  Agreement  ("Agreement")  is  entered  into on the  date
written below by and between  NanoSensors,  Inc., (the "Company") having a place
of business at 1800 Wyatt  Drive,  Santa  Clara,  California  95054 and Ted Wong
("Consultant")  having a place of  residence  at 663  Spruce  Drive,  Sunnyvale,
California 94086.

                                    RECITALS

      A.  The  Company  is in the  business  of the  development  of  explosive,
chemical and biological sensors.

      B. Consultant has certain skills, experience and abilities with respect to
the Company's business.

      C. The Company desires to retain  Consultant as an independent  contractor
to perform  consulting  services (the "Services") for the Company and Consultant
is willing to perform  such  services,  on the basis set forth more fully below.
Additionally,  Consultant  shall  serve as an officer of the  Company  under the
direction of the Company.

                                   AGREEMENT

      NOW THEREFORE,  in consideration of the mutual promises  contained herein,
the Company and Consultant agree as follows:

      1. Services.  Consultant agrees to perform the Services on the business of
the Company to develop and market  sensors to detect  explosives,  chemicals and
biologicals. Consultant agrees to the terms of this Agreement.

      2. Payment for Services. The Company shall pay Consultant a consulting fee
of $14,833 per month  starting on September 1, 2003 together with  reimbursement
for   Consultant's   direct  costs  such  a  travel  expenses  which  have  been
pre-approved  by the  Company.  The  consulting  fee may be  modified  by mutual
agreement by the Company and Consultant if less than full time of the Consultant
is available for consulting.

      3. Relationship of Parties. Consultant shall perform the Service under the
general direction of the Company and agrees to devote his or her best efforts to
the Service and to the reasonable satisfaction of the Company.  Notwithstanding,
Consultant shall  determine,  in Consultant's  sole  discretion,  the manner and
means by which the Services are  accomplished,  subject to the express condition
that Consultant shall at all times comply with applicable law.  Consultant is an
independent  contractor  and  Consultant  is not an  agent  or  employee  of the
Company,  and has no  authority  whatsoever  to bind the  Company by contract or
otherwise.

<PAGE>

      4. Time Commitment  Consultant shall commit the amount of the Consultant's
time to the Services as acceptable to the Company.

      5. Taxes and Benefits. Consultant acknowledges and agrees that it shall be
the  obligation of Consultant to report as income all  compensation  received by
Consultant  pursuant to this  Agreement and  Consultant  agrees to indemnify the
Company  and hold it  harmless  to the extent of any  obligation  imposed on the
Company to pay any taxes or insurance, including without limitation, withholding
taxes,  social  security,   unemployment,  or  disability  insurance,  including
interest  and  penalties  thereon,  in  connection  with  any  payments  made to
Consultant by the Company pursuant to this Agreement.

      6.  Inventions.  All inventions,  discoveries,  concepts and ideas whether
patentable or not, including but not limited to hardware,  software,  processes,
methods,  techniques as well as  improvements  thereto  conceived  (collectively
referred to as "Developments"),  made,  conceived or developed by Consultant and
its agents,  alone or with others,  which result from or relate to the Company's
business shall be the properties of the Company.

      7. Confidentiality.  Consultant and its agents agree to hold the Company's
Confidential   Information  in  strict  confidence  and  not  to  disclose  such
Confidential Information to any third parties. Consultant and its agents further
agree to deliver  promptly all  Confidential  Information in Consultant's or its
agents  possession  to the Company at any time upon the Company's  request.  For
purposes hereof,  "Confidential  Information" shall include all confidential and
proprietary  information  disclosed by the Company  including but not limited to
technical  and  business  information  relating  to the  Company's  current  and
proposed  products,  research and  development,  production,  manufacturing  and
engineering processes, costs, profit or margin information, finances, customers,
suppliers,  marketing  and  production,  personnel  and future  business  plans.
"Confidential Information" also includes proprietary or confidential information
of any  third  party  who  may  disclose  such  information  to the  Company  or
Consultant  and its agents in the course of the  Company's  business.  The above
obligations  shall not apply to Confidential  Information which is already known
to the  Consultant  or its agents at the time it is  disclosed,  or which before
being divulged  either (a) has become  publicly known through no wrongful act of
the  Consultant  or its agents;  (b) has been  rightfully  received from a third
party without  restriction on disclosure and without breach of this Agreement or
other  Agreements  entered  into  by the  Company;  (c) has  been  independently
developed by the Consultant or its agents;  (d) has been approved for release by
written  authorization  of the  Company;  (e) has been  disclosed  pursuant to a
requirement of a governmental agency or of law.

      8.  Termination.  This  Agreement  shall commence in September of 2003 and
shall continue for two (2) years until terminated as follows:

            (a)  Either  party may  terminate  the  Agreement  in the event of a
breach by the other  party of any of its  obligations  contained  herein if such
breach  continues  uncured for a period of ten (10) days after written notice of
such breach to the other party;

<PAGE>

            (b) Either party may terminate this Agreement upon written notice to
the other  party if either  party is  adjudicated  bankrupt,  files a  voluntary
petition of bankruptcy, makes a general assignment for the benefit of creditors,
is unable to meet its  obligations in the normal course of business as they fall
due or if a receiver is appointed on account of insolvency;

            (c) Either party may terminate  this  Agreement for its  convenience
upon ninety  (90) days  written  notice to the other if there is no  outstanding
Project Assignment.

                  Upon the  termination of this  Agreement for any reason,  each
party  shall be  released  from all  obligations  and  liabilities  to the other
occurring  or  arising  after  the  date of such  termination,  except  that any
termination  shall not relieve  Consultant  or the Company of their  obligations
under Paragraph 5 ("Taxes and Benefits"), Paragraph 6 ("Inventions"),  Paragraph
7  ("Confidentiality")   and  Paragraph  9  ("General"),   nor  shall  any  such
termination  relieve  Consultant or the Company from any liability  arising from
any breach of this Agreement.

      9. General.

            (a)  Pre-Existing  Obligations.  Consultant  represents and warrants
that  Consultant  is  not  under  any  pre-existing  obligation  or  obligations
inconsistent with the provisions of this Agreement.

            (b)  Assignment.  The rights and  liabilities  of the parties hereto
shall bind and inure to the benefit of their  respective  successors,  executors
and  administrators,  as the case may be,  provided  that,  as the  Company  has
contracted for Consultant's services,  Consultant may not assign or delegate its
obligations  under this  Agreement  either in whole or in part without the prior
written consent of the Company.

            (c) Equitable  Relief.  Because the Services are personal and unique
and  because  Consultant  shall have  access to and become  acquainted  with the
Confidential  Information  of the  Company,  Consultant  agrees that the Company
shall have the right to enforce  this  Agreement  and any of its  provisions  by
injunction, specific performance or any other equitable relief without prejudice
to any other  rights and  remedies  that the  Company may have for the breach of
this Agreement.

            (d) Attorney's  Fees. If any action at law or in equity is necessary
to enforce the terms of this Agreement,  the prevailing  party shall be entitled
to  reasonable  attorney's  fees,  costs and  expenses  in addition to any other
relief to which such prevailing party may be entitled.

            (e) Governing Law; Severability. This Agreement shall be governed by
and construed in  accordance  with the laws of the State of  California.  If any
provision  of this  Agreement  is for any reason  found by a court of  competent
jurisdiction to be unenforceable, the remainder of this Agreement shall continue
in full force and effect.

<PAGE>

            (f)  Counterpart.  This  Agreement may be executed in  counterparts,
each of which shall constitute an original and all of which shall be one and the
same instrument.

            (g) Complete Understanding Modification.  This Agreement constitutes
the full and complete  understanding  and  Agreement  of the parties  hereto and
supersedes all prior understandings and agreements. Any waiver,  modification or
amendment of any provision of this Agreement  shall be effective only in writing
and signed by the parties thereto.

            (h)  Waiver.  The  failure  of either  party to insist  upon  strict
compliance  with any of the terms,  covenants or conditions of this Agreement by
the  other  party  shall  not be  deemed  a waiver  of that  term,  covenant  or
condition,  nor shall any waiver or  relinquishment of any right or power at any
one time be deemed a waiver or  relinquishment of that right or power for all or
any other time.

            (i) Notices.  Any notices  required or permitted  hereunder shall be
given to the appropriate  party at the address  specified below or at such other
address as the party shall specify in writing and shall be by personal delivery,
facsimile  transmission  or certified or registered  mail.  Such notice shall be
deemed given upon personal  delivery to the appropriate  address or upon receipt
of electronic  transmission  or, if sent by certified or registered  mail, three
days after the date of the mailing.

<PAGE>

      IN WITNESS  WHEREOF,  the parties  hereto have signed this Agreement as of
the date written below.

COMPANY:                                        CONSULTANT:

NANOSENSORS, INC.                               TED WONG

 /s/ Ted Wong                                    /s/ Ted Wong
----------------------------------------        --------------------------------
Ted Wong, CEO & President                       Ted Wong

Date: 9/1/03                                    Date: 9/1/03
                                                     --------

Address:                                        Address:
1800 Wyatt Drive                                663 Spruce Drive
Santa Clara, Calif. 95054                       Sunnyvale, Calif. 94086STOCKHOLDERS' AGREEMENT

      This Stockholders' Agreement ("Agreement") is entered into as of July 22,
2004, by and among TRIDENT ROWAN GROUP, INC., a Maryland corporation (the
"Company"), and each of the stockholders set forth on SCHEDULE A attached hereto
(the "Stockholders").

                                    Recitals

      A. The execution and delivery of this Agreement is a condition to the
closing of the transactions contemplated by that certain Share Exchange
Agreement, dated as of May 25, 2004, by and among the Company, each of the
persons listed under the caption "Company Stockholders" on SCHEDULE A attached
hereto, and Comtech Group, Inc. (the "Share Exchange Agreement").

      B. The Company and the Stockholders are entering into this Agreement to
provide for (i) the designation and voting by the Stockholders, and the
nomination by the Company, of certain Persons to serve on the Company's Board
(as hereinafter defined); and (ii) restrictions on transfer, sale or other
disposition of shares of the Company's Common Stock (as hereinafter defined) by
the Stockholders.

      NOW, THEREFORE, in consideration of the mutual promises and covenants
hereinafter set forth, the parties hereto agree as follows:

                                   Section 1
                               DEFINITIONS; EFFECT

      1.1. Definitions. As used in this Agreement, the following terms shall
have the following respective meanings:

      "Acquiror Nominees" has the meaning set forth in the Share Exchange
Agreement.

      "Acquiror Stockholders" means those persons listed on SCHEDULE A to this
Agreement under the caption "Acquiror Stockholders".

      "Act" means the Securities Act of 1933, as amended.

      "Commission" means the Securities and Exchange Commission.

      "Common Stock" means the common stock, $0.01 par value per share, of the
Company.

      "Company Board" means the board of directors of the Company.

      "Company Nominees" has the meaning set forth in the Share Exchange
Agreement.

<PAGE>

      "Company Securities" means the Common Stock, Options and any other equity
securities of the Company issued and outstanding at any time.

      "Company Stockholders" means those persons listed on SCHEDULE A to this
Agreement under the caption "Company Stockholders".

      "Escrow Shares" means 16,058,085 shares held in escrow with Loeb & Loeb
LLP, pursuant to the terms of that certain Escrow Agreement dated as of even
date herewith.

      "Options" means any rights, options or warrants to purchase shares of any
Common Stock or Preferred Stock or securities or obligations convertible or
exercisable into any Common Stock or Preferred Stock.

      "Share Exchange Agreement" has the meaning set forth in Recital A above.

      "Stockholders" has the meaning set forth in the first paragraph of this
Agreement.

      "Transfer" means, with respect to the Company Securities, any transfer,
sale, gift, exchange, assignment, pledge or other encumbrance or disposition of
Company Securities by a Holder and in the case of a Stockholder that is not an
individual, a Transfer of any Company Securities held by such Stockholder shall
be deemed to have been made if any equity interest in such Stockholder is
directly or indirectly transferred, sold, given, exchanged, assigned, pledged or
disposed of to any other Person.

                                   Section 2
                      AFFIRMATIVE COVENANTS OF THE COMPANY
                              AND THE STOCKHOLDERS

      2.1. Voting Agreement.

            (a) Designation and Nomination of Directors. During the two-year
period commencing on the date hereof, the Company shall nominate at each annual
meeting of stockholders of the Company, the Company Nominees and the Acquiror
Nominees to serve on the Company's Board of Directors. Each year during such
period, the Company Stockholders and the Acquiror Stockholders shall submit to
the Company their director designees for Company Nominees and Acquiror Nominees,
respectively, not less than twenty (20) calendar days before the date of the
Company's proxy statement released to stockholders in connection with the
previous year's annual meeting.

            (b) Voting for Directors. Each of the Stockholders severally
covenants and agrees that such Stockholder shall vote all shares of the Company
Securities owned or controlled by such Stockholder and over which such
Stockholder has voting control, as of the record date of any action of the
stockholders of the Company, and shall take all other necessary actions and
actions reasonably requested by any other Stockholder within such Stockholder's
control (including, without limitation, attendance at meetings in person or by
proxy for purposes of obtaining a quorum and execution of written consents or
resolutions in lieu of meetings), so that the Company Nominees and the Aquiror
Nominees shall be elected to the Company Board.

                                       2
<PAGE>

            (c) Filling Vacancies. If at any time in the interim between annual
meetings of stockholders or special meetings of stockholders called for the
election of directors, vacancies exist on the Board of Directors, such vacancies
shall be filled by the appointment of directors, either by (i) the remaining
Company Nominees, if such vacancy was created by a Company Nominee, or (ii) the
remaining Acquiror Nominees, if such vacancy was created by an Acquiror Nominee.

            (d) Payment of Expenses. The Company shall pay the reasonable
out-of-pocket travel, lodging and other related expenses of all directors
elected pursuant to this Section 2.1 incurred in connection with attendance at
meetings of the Company Board or any committee thereof.

            (e) Number of Directors. Pursuant to the Company's By-laws, the
Company Board consists of seven directors.

                                   Section 3
                            RESTRICTIONS ON TRANSFER

      3.1. Transfer Restrictions. Without limiting the restrictions on Transfer
of securities of the Company as provided in the lock up letters executed as of
even date herewith by each of the Stockholders, any Transfer by the Stockholder
shall remain at all times subject to applicable securities laws, including
without limitation, the resale restrictions imposed by Rule 144 promulgated
under the Act.

                                   Section 4
                                 CONFIDENTIALITY

      4.1. Confidentiality. Each Stockholder covenants and agrees to maintain
the confidentiality of all non-public information related to the business of the
Company made available to the Stockholder and/or any of their representatives by
the Company ("Confidential Business Information"). Without the prior written
consent of the Company, each Stockholder further covenants and agrees not to
disclose any Confidential Business Information to any person or entity, other
than their respective Affiliates, partners and prospective partners, officers,
directors, employees, attorneys, accountants and other agents ("Related
Parties") and except as required by law or by government regulators; provided
that to the extent a Stockholder discloses Confidential Business Information to
Related Parties the Stockholder will advise the Related Party that the
information is confidential and subject to this Agreement and that by accepting
the information the Related Party acknowledges the information's
confidentiality. Each Stockholder agrees that violation of this Section 4.1
would cause immediate and irreparable damage to the business of the Company, and
consents to the entry of immediate and permanent injunctive relief for any
violation thereof. Confidential Business Information excludes (a) information
that is or becomes available to the public, other than by reason of the
recipient's disclosure thereof to the public, (b) information that the recipient
can demonstrate was known to the recipient prior to the recipient's receipt of
the information from the Company or (c) information that becomes available to
the recipient from a third person or source not known by the recipient to owe a
duty of confidentiality to the Company.

                                       3
<PAGE>

                                   Section 5
                                  MISCELLANEOUS

      5.1. Legends. The Company and the Stockholders agree that, so long as this
Agreement is in effect, all Company Securities now or hereafter held by any
Stockholder will be stamped or otherwise imprinted with a legend in
substantially the following form, in addition to any other legends required by
any and all applicable federal or state securities laws:

      THE SECURITIES EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO AGREEMENTS,
      COVENANTS AND RESTRICTIONS, INCLUDING WITH RESPECT TO VOTING FOR DIRECTORS
      CONTAINED IN THE STOCKHOLDERS' AGREEMENT DATED JULY 22 2004, AS AMENDED
      FROM TIME TO TIME, BY AND AMONG TRIDENT ROWAN GROUP, INC. AND THE PERSONS
      NAMED THEREIN, and the lock up letter executed by the stockholders, dated
      JULY 22, 2004. A COPY OF SUCH AGREEMENT MAY BE OBTAINED BY ANY STOCKHOLDER
      OF THE COMPANY UPON REQUEST WITHOUT CHARGE FROM THE SECRETARY OF THE
      COMPANY AT THE PRINCIPAL OFFICE OF THE COMPANY.

      5.2. Waivers and Amendments. The rights and obligations of the Company and
the Stockholders hereunder may only be waived (either generally or in a
particular instance, either retroactively or prospectively, and either for a
specified period of time or indefinitely) or amended with the written consent of
a majority of the shares of Company Securities held by each of the Company
Stockholders and the Acquiror Stockholders, respectively, voting separately.
Upon the effectuation of each such waiver or amendment, the Company shall
promptly give written notice thereof to the holders of the shares who have not
previously consented thereto in writing.

      5.3. Governing Law. This Agreement will be governed by the laws of the
State of New York without regard to conflicts of laws principles.

      5.4. Successors and Assigns. This Agreement shall be binding on each party
hereto with respect to all Company Securities now or hereafter held by each
Stockholder. Except as otherwise expressly provided herein, the provisions
hereof shall inure to the benefit of, and be binding upon, the successors,
assigns, heirs, executors and administrators of the parties hereto.

      5.5. Entire Agreement. Section 2.4 of the Share Exchange Agreement is
hereby incorporated by reference. This Agreement constitutes the full and entire
understanding and agreement between the parties with regard to the subjects
hereof and thereof. This Agreement supersedes all prior and inconsistent
agreements and understandings between and among any of the parties hereto.

      5.6. Notices. All demands, notices, requests, consents and other
communications required or permitted under this Agreement shall be in writing
and shall be personally delivered or sent by facsimile machine (with a
confirmation copy sent by one of the other methods authorized in this Section),
commercial (including Federal Express) or U.S. Postal Service overnight delivery
service, or deposited in the U.S. Postal Service mailed first class, registered
or certified mail, postage prepaid, as set forth below:

                                       4
<PAGE>

                              If to the Company, addressed to:

                                        Trident Rowan Group, Inc.
                                        c/o Comtech Group
                                        Room 1001, Tower C, Skyworth Building
                                        High-Tech Industrial Park
                                        Nanshan, Shenzhen PRC

                                        Attention:  Mr. Jingwei Kang
                                        Telephone No.: 011-755-267-4327
                                        Facsimile No.:  011-755-267-43508

                              with a copy to:

                                        Loeb & Loeb LLP
                                        345 Park Avenue
                                        New York, NY  10154
                                        Attn:  Mitchell S. Nussbaum, Esq.
                                        Telephone No.:  (212) 407-4159

                                        Facsimile No.:  (212) 407-4990

                              If to any Company Stockholder, at the address
                              set forth on
                              SCHEDULE A
                              ----------

                              with a copy to:

                                       Loeb & Loeb LLP
                                       345 Park Avenue
                                       New York, NY  10154
                                       Attn:  Mitchell S. Nussbaum, Esq.
                                       Telephone No.:  (212) 407-4159

                                       Facsimile No.:  (212) 407-4990

                              If to any Acquiror Stockholder, at the address
                              set forth on
                              SCHEDULE A
                              ----------

                              with a copy to:

                                       Kramer, Levin, Naftalis & Frankel LLP
                                       919 Third Avenue
                                       New York, New York 10022-3852
                                       Attention:  Scott S. Rosenblum, Esq.
                                       Telephone No.:  (212) 715-9411
                                       Facsimile No.:  (212) 715-8000

                                       5
<PAGE>

      Notices shall be deemed given upon the earlier to occur of (i) receipt by
the party to whom such notice is directed; (ii) if sent by facsimile machine, on
the date (other than a Saturday, Sunday or legal holiday in the jurisdiction to
which such notice is directed) such notice is sent if sent (as evidenced by the
facsimile confirmed receipt) prior to 5:00 p.m. Eastern Time and, if sent after
5:00 p.m. Eastern Time, on the day (other than a Saturday, Sunday or legal
holiday in the jurisdiction to which such notice is directed) after which such
notice is sent; (iii) on the first business day (other than a Saturday, Sunday
or legal holiday in the jurisdiction to which such notice is directed) following
the day the same is deposited with the commercial carrier if sent by commercial
overnight delivery service; or (iv) the fifth day (other than a Saturday, Sunday
or legal holiday in the jurisdiction to which such notice is directed) following
deposit thereof with the U.S. Postal Service as aforesaid. Each party, by notice
duly given in accordance therewith may specify a different address for the
giving of any notice hereunder.

      5.7. Severability. If any provision of this Agreement is held invalid or
unenforceable by any court of competent jurisdiction, the other provisions of
this Agreement will remain in force and effect. Any provision of this Agreement
held invalid or unenforceable only in part or degree will remain in full force
and effect to the extent not held invalid or unenforceable.

      5.8. Titles and Subtitles. The titles of the sections and subsections of
this Agreement are for convenience of reference only and are not to be
considered in construing this Agreement.

      5.9. Counterparts. This Agreement may be executed in one or more
counterparts, each of which, when taken together, will be deemed to constitute
on and the same agreement.

      5.10. Consent to Jurisdiction. The Company and each Holder hereby agree to
submit to the exclusive jurisdiction of the courts of the State of New York and
to the courts to which an appeal of the decisions of such courts may be taken,
and consents that service of process with respect to all courts in and of the
State of New York may be made by registered mail to it at the address set forth
on SCHEDULE A hereto.

      5.11. Remedies.

            (a) The parties hereto agree that irreparable harm would occur in
the event that any of the agreements and provisions of this Agreement were not
performed fully by the parties hereto in accordance with their specific terms or
were otherwise breached, and that money damages are an inadequate remedy for
breach of the Agreement because of the difficulty of ascertaining and
quantifying the amount of damage that will be suffered by the parties hereto in
the event that this Agreement is not performed in accordance with its terms or
is otherwise breached. It is accordingly hereby agreed that the parties hereto
shall be entitled to an injunction or injunctions to restrain, enjoin and
prevent breaches of this Agreement by the other parties and to enforce
specifically such terms and provisions of this Agreement, such remedy being in
addition to and not in lieu of, any other rights and remedies to which the other
parties are entitled to at law or in equity.

                                       6
<PAGE>

            (b) Except where a time period is otherwise specified, no delay on
the part of any party in the exercise of any right, power, privilege or remedy
hereunder shall operate as a waiver thereof, nor shall any exercise or partial
exercise of any such right, power, privilege or remedy preclude any further
exercise thereof or the exercise of any right, power, privilege or remedy.

      5.12. Waiver of Jury Trial. Each of the parties hereto hereby voluntarily
and irrevocably waive all rights to a trial by jury in any action or other
proceeding brought in connection with or any matter arising under, out of or
relating to, this Agreement (as this Agreement may hereafter be amended) or any
of the transactions contemplated hereby or thereby.

      5.13. No Third Party Rights. This Agreement and all of its provisions and
conditions are for the sole and exclusive benefit of the parties to this
Agreement and their successors or assigns.

      5.14. Duration. This Agreement shall terminate and be of no further force
or effect upon the written agreement of all of the parties hereto to terminate
this Agreement, except that the provisions of Section 4.1 shall survive any
termination of this Agreement.

                                       7
<PAGE>

      IN WITNESS WHEREOF, the Company and the Holders have executed this
Agreement as of the date first set forth above.

                                  "Company"

                                        TRIDENT ROWAN GROUP, INC.

                                        By:          /s/ Mark Hauser
                                        ----------------------------------
                                        Name:        Mark Hauser
                                        ----------------------------------
                                        Title:       Co-Chief Executive Officer
                                        ----------------------------------

                                  "Stockholders"

                                        MARK HAUSER
                                        ----------------------------------
                                        (Print Name of Holder)

                                        /s/Mark Hauser
                                        ----------------------------------
                                        (Signatory)

                                        Mark Hauser
                                        ----------------------------------
                                        (Print Name of Signatory)

                                        EMANUEL ARBIB
                                        ----------------------------------
                                        (Print Name of Holder)

                                        /s/ Emanuel Arbib
                                        ----------------------------------
                                        (Signatory)

                                        Emanuel Arbib
                                        ----------------------------------
                                        (Print Name of Signatory)

                                        MARK SEGALL
                                        ----------------------------------
                                        (Print Name of Holder)

                                        /s/ Mark Segall
                                        ----------------------------------
                                        (Signatory)

                                        Mark Segall
                                        ----------------------------------
                                        (Print Name of Signatory)

                                       8
<PAGE>

                                        ----------------------------------
                                        COMTECH GLOBAL INVESTMENT LTD.
                                        ----------------------------------
                                        (Print Name of Holder)

                                        /s/J. Kang
                                        ----------------------------------
                                        (Signatory)

                                        Jingwei (Jeffrey)Kang
                                        ----------------------------------
                                        (Print Name of Signatory)

                                        Sole Director
                                        (Title of Signatory)

                                        ----------------------------------
                                        PURPLE MOUNTAIN HOLDING LTD..
                                        ----------------------------------
                                        (Print Name of Holder)

                                        /s/Justin Tang
                                        ----------------------------------
                                        (Signatory)

                                        Yue (Justin) Tang
                                        ----------------------------------
                                        (Print Name of Signatory)

                                        President/ Director
                                        (Title of Signatory)

                                        REN INVESTMENT INTERNATIONAL LTD.
                                        ----------------------------------
                                        (Print Name of Holder)

                                        /s/J. Kang
                                        ----------------------------------
                                        (Signatory)

                                        Jingwei (Jeffrey)Kang
                                        ----------------------------------
                                        (Print Name of Signatory)

                                        Sole Director
                                        (Title of Signatory)

                                       9
<PAGE>

                                   SCHEDULE A

                        NAME AND ADDRESS OF STOCKHOLDERS

COMPANY STOCKHOLDERS

Comtech Global Investment Ltd.
Romasco Place
P.O. Box 3140
Road Town, Tortola
British Virgin Islands

Purple Mountain Holding Ltd.
3rd Floor, Qwomar Complex
P.O. Box 765
Road Town, Tortola
British Virgin Islands

Ren Investment International Ltd.
c/o Comtech Technology (Shenzhen) Ltd.
Room 1001, Tower C, Skyworth Building
High-Tech Industrial Park
Nanshan, Shenzhen PRC

ACQUIROR STOCKHOLDERS

Mark Hauser
c/o FdG Associates
299 Park Avenue
16th Floor
New York, NY 10171

Emanuel Arbib
4 Hill Street
London WNJSNE
United Kingdom

Mark Segall
251 West 89th Street, Apt. 2D
New York. NY 10024

                                       10

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