Document:

THIS SECURED CONVERTIBLE PROMISSORY NOTE, AND THE SECURITIES INTO WHICH IT IS
CONVERTIBLE (COLLECTIVELY, THE "SECURITIES"), HAVE NOT BEEN REGISTERED WITH THE
UNITED STATES SECURITIES AND EXCHANGE COMMISSION OR THE SECURITIES COMMISSION OF
ANY STATE. THE SECURITIES ARE BEING OFFERED PURSUANT TO AN EXEMPTION FROM
REGISTRATION UNDER SECTION 4(2) OF THE SECURITIES ACT OF 1933, AS AMENDED (THE
"ACT"), AND REGULATION D THEREUNDER. THE SECURITIES ARE "RESTRICTED" AND MAY NOT
BE OFFERED OR SOLD UNLESS THE SECURITIES ARE REGISTERED UNDER THE ACT AND
APPLICABLE STATE LAW OR PURSUANT TO AVAILABLE EXEMPTIONS FROM THE REGISTRATION
REQUIREMENTS THEREOF AND THE COMPANY IS PROVIDED WITH AN OPINION OF COUNSEL OR
OTHER SUCH INFORMATION AS IT MAY REASONABLY REQUIRE TO CONFIRM THAT SUCH
EXEMPTIONS ARE AVAILABLE.

                       SECURED CONVERTIBLE PROMISSORY NOTE

                   ADVANCED COMMUNICATIONS TECHNOLOGIES, INC.

                     6% Secured Convertible Promissory Note

                              Due December 29, 2005

No.  2                                                               $333,111.00

      This Secured Convertible Promissory Note (this "Note") is issued by
ADVANCED COMMUNICATIONS TECHNOLOGIES, INC., a Florida corporation (the
"Company"), to HUI CYNTHIA LEE (together with her permitted successors and
assigns, the "Holder") pursuant to exemptions from registration under the
Securities Act of 1933, as amended. Capitalized terms not otherwise defined
herein shall have the meanings given such terms in that certain Stock Purchase
Agreement of even date herewith by and between the Company, the initial Holder
and the other parties named therein (the "Purchase Agreement").

                                   ARTICLE I.

      Section 1.01 Principal and Interest. For value received on December 30,
2004 (the "Issue Date"), the Company hereby promises to pay on December 29, 2005
(the "Maturity Date") to the order of the Holder in lawful money of the United
States of America and in immediately available funds the principal sum of Three
Hundred Thirty Three Thousand One Hundred Eleven Dollars (US $333,111.00),
together with accrued and unpaid interest on the unpaid principal of this Note
at the annual simple rate of six percent (6%) (computed on the basis of a
365/6-day year and the actual days elapsed) from the Issue Date until all
amounts due and owing hereunder by the Company to the Holder have been paid in
full. Upon the occurrence and during the continuance of an Event of Default (as
defined below) interest on the unpaid principal amount of this Note shall accrue
at the annual simple rate of ten percent (10%) (computed on the basis of a
365/6-day year and the actual days elapsed).
<PAGE>

      Section 1.02 Optional Conversion. On or after the Issue Date, the Holder
shall be entitled, at its option, to convert, at any time and from time to time,
until payment in full of all amounts due and owing under this Note, all or any
part of the unpaid principal amount of the Note, into shares (the "Conversion
Shares") of the Company's common stock, no par value per share, ("Common
Stock"), at a price per share (the "Conversion Price") equal to $0.01, subject
to adjustment for stock splits, reverse stock splits and other recapitalizations
effected by the Company. To convert this Note, the Holder shall deliver written
notice thereof, substantially in the form of Exhibit "A" to this Note, with
appropriate insertions (the "Conversion Notice"), to the Company in accordance
with Section 6.01 hereof. The date set forth in the Conversion Notice shall be
deemed to be the date upon which the conversion shall be effective (the
"Conversion Date").

      Section 1.03 Right of Repurchase/Redemption. At any time on or prior to
the Maturity Date, the Company shall, at its option, have the right to redeem,
upon three (3) business days prior written notice to the Holder (the "Redemption
Notice"), a portion or all of the outstanding amount due and owing under this
Note (the "Redemption Right"). In the event the Company exercises its Redemption
Right on or prior to July __, 2005, the redemption price shall be one hundred
five percent (105%) of the principal amount redeemed, thereafter the redemption
price shall be one hundred ten percent (110%) of the principal amount redeemed.
Upon redemption, the Company shall also pay all accrued and unpaid interest
thereon. The third business day after the Holder's receipt of the Redemption
Notice shall be referred to herein as the "Redemption Date." Once the Company
has issued to the Holder a Redemption Notice, the Holder may continue to execute
conversions at any time, and from time to time, on or prior to the business day
immediately preceding the Redemption Date. Notwithstanding the foregoing,
payment by the Company on or after the Maturity Date of all amounts due and
owing hereunder shall not be deemed an exercise by the Company of its Redemption
Right.

                                  ARTICLE II.

      Section 2.01 Amendments and Waiver of Default. This Note may be amended
solely with the written consent of the Holder and the Company.

                                  ARTICLE III.

      Section 3.01 Events of Default. An Event of Default is defined as follows:
the Company shall (i) make a general assignment for the benefit of creditors;
(ii) be adjudicated as bankrupt or insolvent; (iii) file a voluntary petition in
bankruptcy; (iv) have a petition or proceeding filed against it under any
bankruptcy or insolvency law or statute of the United States of America or any
state or jurisdiction thereof, which petition or proceeding is not dismissed
within ninety (90) days from the date of commencement thereof; or (v) have a
receiver, trustee, custodian, conservator or other person appointed by any court
to take charge of the Company's affairs, assets or business and such appointment
is not vacated or discharged within ninety (90) days thereafter.

                                       2
<PAGE>

      Section 3.02 Remedy. Upon the occurrence of an Event of Default, the
Holder may declare the principal amount hereof, and all accrued and unpaid
interest, to be forthwith due and payable whereupon the same shall immediately
become due and payable.

                                  ARTICLE IV.

      Section 4.01 Re-issuance of Note. If and whenever the Holder elects to
convert a part of the Note pursuant to Section 1.02 hereof, the Company shall
reissue a new Note in the same form as this Note to reflect the new principal
amount.

      Section 4.02 Termination of Conversion Rights. The Holder's right to
convert all or any portion of the unpaid principal amount under this Note into
Conversion Shares in accordance with Section 1.02 hereof shall terminate on the
date that all amounts due and owing hereunder are paid in full.

                                   ARTICLE V.

      Section 5.01 Security Interest. To secure the Company's payment
obligations hereunder, the Company hereby grants to the Holder a security
interest in and to those Shares delivered by the Holder pursuant to the Purchase
Agreement and the Pledge Agreement. Such security interest will be a first
priority lien provided there are no Encumbrances on the Shares on the Closing
Date. ARTICLE VI.

      Section 6.01 Notices. Any notices, consents, waivers, or other
communications required or permitted to be given under the terms of this Note
must be in writing and will be deemed to have been delivered (i) upon receipt,
when delivered personally; (ii) upon confirmation of receipt, when sent by
facsimile; (iii) three (3) business days after being sent by U.S. certified
mail, return receipt requested; or (iv) one (1) business day after deposit with
a nationally recognized overnight delivery service, in each case properly
addressed to the party to receive the same. The addresses and facsimile numbers
for such communications shall be:

                  if to the Company:

                           Advanced Communications Technologies, Inc.
                           420 Lexington Avenue, Suite 2739
                           New York, NY  10170
                           Attention:  Wayne Danson, Chief Executive Officer
                           Facsimile:  646.227.1666

                  With a copy to:

                           Eckert Seamans Cherin & Mellott, LLC
                           1515 Market Street - 9th Floor
                           Philadelphia, PA  19102
                           Attention:  Gary A. Miller, Esquire
                           Facsimile:  215.851.8383

                              3
<PAGE>

                  if to the Holder:

                           Hui Cynthia Lee
                           [Address]
                           ------------------------

                  with a copy to:

                           Quarles & Brady Streich Lang LLP
                           Renaissance One
                           Two N. Central Avenue
                           Phoenix, Arizona  85004-2391
                           Attention:  Christian J. Hoffmann, III, Esquire
                           Fax:  602-420-5008

or to such other persons or addresses as may be designated in writing by the
party to receive such notice as provided above.

      Section 6.02 Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of New York without regard to
principles of choice of law or conflicts of laws that would defer to the
substantive law of another jurisdiction. The Company and the Holder irrevocably
consent to the jurisdiction of the United States federal courts and the state
courts located in the State of New York in any suit or proceeding based on or
arising under this Note and irrevocably agree that any and all claims arising
out of this Note or related to the transactions contemplated by this Note shall
be determined exclusively in such courts. The Company and the Holder irrevocably
waive the defense of an inconvenient forum to the maintenance of such suit or
proceeding. The Company and the Holder further agree that service of process
mailed by first class mail shall be deemed in every respect effective service of
process in any such suit or proceeding. Nothing herein shall affect the right of
either the Company or the Holder to serve process in any other manner permitted
by law. The Company and the Holder agree that a final non-appealable judgment in
any such suit or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on such judgment or in any other lawful manner.

      Section 6.03 Severability. The invalidity of any of the provisions of this
Note shall not invalidate or otherwise affect any of the other provisions of
this Note, which shall remain in full force and effect.

         [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                       4
<PAGE>

      IN WITNESS WHEREOF, with the intent to be legally bound hereby, the
Company has executed this Note as of the date first written above.

                             ADVANCED COMMUNICATIONS TECHNOLOGIES, INC.

                             By:    /s/ Wayne I. Danson
                                -------------------------------------------
                             Name:  Wayne I. Danson
                             Title: President and Chief Financial Officer

                                       5
<PAGE>

                                   EXHIBIT "A"

                              NOTICE OF CONVERSION

           (To be executed by the Holder in order to Convert the Note)

TO:

         The undersigned hereby irrevocably elects to convert $ of the principal
amount of the above Note into Shares of Common Stock of ADVANCED COMMUNICATIONS
TECHNOLOGIES, INC., according to the conditions stated therein, as of the
Conversion Date written below.

Conversion Date:
                                      ------------------------------------------

Applicable Conversion Price:
                                      ------------------------------------------

Signature:
                                      ------------------------------------------
Name:

                                      ------------------------------------------

Address:
                                      ------------------------------------------

Amount to be converted:  $
                                      ------------------------------------------

Amount of Note unconverted: $
                                      ------------------------------------------

Conversion Price per share: $
                                      ------------------------------------------

Number of shares of Common Stock to be
issued:
                                      ------------------------------------------

                                      A-1CUSTODIAL AND STOCK PLEDGE AGREEMENT

      THIS CUSTODIAL AND STOCK PLEDGE AGREEMENT ("Agreement"), dated as of
December 30, 2004, is by and among ADVANCED COMMUNICATIONS TECHNOLOGIES, INC.
(referred to as the "Pledgor"), THEODORE S. LI and HUI CYNTHIA LEE (together,
the "Pledgees") and QUARLES & BRADY STREICH LANG LLP ("Custodian").

      NOW, THEREFORE, in consideration of the premises and the mutual promises
herein contained, and intending to be legally bound hereby, the parties hereto
agree as follows:

      1. Background.

      Pledgor and Pledgees are parties to that certain Stock Purchase Agreement,
dated December 10, 2004 (the "Purchase Agreement"), pursuant to which Pledgees
agreed to sell to Pledgor, and Pledgor agreed to purchase from Pledgees, all of
the outstanding shares of common stock of Pacific Magtron International Corp.
(the "Company") owned by Pledgees (the "Pledged Shares"). In exchange for the
Pledged Shares, Pledgor issued to Sellers promissory notes in aggregate
principal amount of $500,000 (each a "Note" and together the "Notes"). To secure
the payment obligations of Pledgor under the Notes (the "Obligations"), Pledgor
has agreed to grant to Pledgees a security interest in and to the Pledged
Shares. Pledgor and Pledgees agree that until such time all amounts due and
owing under the Notes are paid in full or until their earlier release in
accordance with the terms hereof, as the case may be, the certificates
representing the Pledged Shares shall be held in escrow by Custodian in
accordance with the terms hereof.

      2. Pledge of Pledged Shares.

      2.1 As security for the full and prompt payment of the Notes, Pledgor
hereby pledges to Pledgees all of the Pledged Shares and grants to Pledgees a
lien upon and a continuing security interest in the Pledged Shares, subject to
the terms and conditions of this Agreement. Such security interest will be a
first priority lien provided there are no Encumbrances on the Shares on the
Closing Date. Pledgor will execute and file a UCC-1 Financing Statements
respecting the Shares. Upon payment of each Note the applicable Pledgee hereby
authorizes the Pldgor to file a UCC-3 Financing Statement terminating the
applicable UCC-1 Financing Statement.

      2.2 If Pledgor shall become entitled to receive or shall receive with
respect to the Pledged Shares (i) any additional shares of capital stock of the
Company; or (ii) any stock certificate, including without limitation, any
certificate representing a stock dividend or in connection with any increase or
reduction of capital, reclassification, merger, consolidation, sale of assets,
combination of shares, stock split or other recapitalization; or (iii) any
option, warrant or right, whether as an addition to, in substitution of or in
exchange for any of the Pledged Shares, or otherwise; or (iv) any dividend or
other distribution payable in property, or securities issued by a person other
than the Company; then, in any such event, Pledgor shall receive and accept the
same, in trust, as trustee for Pledgees, and shall deliver them immediately to
Custodian, together with all necessary or appropriate endorsements of Pledgor.
Any cash distributions received by Pledgor in respect of the Pledged Shares may
be applied to reduce such of the Obligations as Pledgor may determine in its
sole discretion.
<PAGE>

      3. Delivery of Shares to Custodian.

      Concurrently with the execution and delivery of this Agreement, Pledgor
hereby authorizes Pledgees to deliver, on behalf of Pledgor, to Custodian for
the account of Sellers, the certificates representing all of the Pledged Shares,
together with duly executed Stock Powers to Pledgees, in the form attached
hereto as Exhibit "A", with signature guaranteed, permitting transfer of the
Pledged Shares to Pledgees or its assignee, receipt of which is hereby
acknowledged by the Custodian, to be held and released in accordance with the
terms of this Agreement. Concurrently with the execution and delivery of this
Agreement, Pledgor is also delivering to Pledgees letters addressed to the
transfer agent of the Company (the "Transfer Agent"), informing the Transfer
Agent of the pledge of the Pledged Shares, instructing the Transfer Agent to
honor the Stock Powers delivered to Pledgees, and informing the Transfer Agent
that Pledgor's address on the records of the transfer agent, during the term of
this Agreement, shall be c/o Quarles & Brady Streich Lang LLP. Pledgor shall
thereafter deliver to Custodian (a) any other certificates for the Pledged
Shares as required by the terms of this Agreement, together with duly executed
stock powers relating to such certificates, with signatures guaranteed; and (b)
any documents or other evidence received of Pledgor's interest in any securities
issued as a dividend, stock split or otherwise because of or with respect to the
Pledged Shares or in exchange for the Pledged Shares, promptly after receiving
such evidence, accompanied by duly executed stock powers or other appropriate
instrument of transfer, with signatures guaranteed covering the same.

      4. Rights of Pledgor in the Pledged Shares.

      Unless and until an Event of Default (as that term is defined herein)
shall have occurred, Pledgor shall be entitled to exercise all voting and other
corporate rights in respect of the Pledged Shares (except for the right to
receive dividends and distributions payable in kind, which shall be delivered to
the Custodian), including, without limitation, all rights and privileges of
conversion, exchange and subscription, as though Pledgor were the absolute owner
of the Pledged Shares, subject to the pledge herein contained. Notwithstanding
the foregoing, Pledgor covenants and agrees that it shall not vote any of the
Pledged Shares in any way inconsistent with the provisions or intent of this
Agreement. All rights of Pledgor to vote and give consents, waivers and
ratifications, and to convert, exchange or subscribe (collectively referred to
as the "Corporate Rights"), shall cease if an Event of Default hereunder shall
occur. If an Event of Default shall occur, whether or not the Pledged Shares
shall have been registered in Pledgees' name, Pledgee then shall have the right
to exercise all Corporate Rights with respect to the Pledged Shares.

      5. Representations and Warranties.

      Pledgor represents and warrants to Pledgees that:

                                       2
<PAGE>

      (a) this Agreement has been duly authorized, executed and delivered by
Pledgor;

      (b) the execution, delivery and performance by Pledgor of Pledgor's
obligations under this Agreement does not and will not violate any provision of
law or any judgment, order or regulation of any court or of any public or
governmental agency or authority applicable to Pledgor or of the Articles of
Incorporation or Bylaws of the Pledgor;

      (c) the execution, delivery and performance by Pledgor of Pledgor's
obligations under this Agreement does not and will not conflict with or
constitute a breach of or a default under any agreement, indenture or instrument
to which Pledgor is a party or by which Pledgor or any of Pledgor's property is
bound; and

      (d) this Agreement constitutes the legal, valid and binding obligation of
Pledgor enforceable in accordance with its terms.

      6. Covenants.

      Pledgor covenants that until all of the Obligations have been satisfied in
full it shall not sell, convey or otherwise dispose of any of the Pledged Shares
or any interest in the Pledged Shares, or create, incur or permit to exist any
pledge, mortgage, lien, charge or encumbrance or any security interest
whatsoever in or with respect to any of the Pledged Shares, other than that
created by this Agreement, nor attempt to do any of the foregoing.

      7. Release of Pledged Shares.

      7.1 Custodian shall disburse the Pledged Shares at any time pursuant to
the joint written instructions of Pledgees and Pledgor (which may be executed
and/or transmitted in counterparts).

      7.2 If, within ten (10) business days after a Maturity Date (as defined in
the respective Notes), Custodian shall not have received a notice from the
applicable Pledgee(s) that the Obligations to such Pledgee(s) have not been
satisfied in full and that such Pledgee(s) disputes Pledgor's right to receive
any Pledged Shares, Custodian shall deliver to Pledgor the Pro Rata Shares (as
defined below) of the Pledgee(s) to which the Maturity Date relates. In the
event Custodian receives such notice from the applicable Pledgee(s), Custodian
shall release the Pledged Shares solely in accordance with Section 9.2 below.

      7.3 Upon delivery of all Pledged Shares by Custodian in accordance with
the terms hereof, this Agreement shall terminate and be of no further force or
effect.

      8. Events of Default.

      Any Event of Default under the Note shall be deemed an Event of Default
hereunder.

                                       3
<PAGE>

      9. Pledgees' Remedies Upon Default.

      9.1 At any time after the occurrence of an Event of Default, any Pledgee
may, at its option, deliver a certificate to the Custodian and Pledgor
specifying the nature of the Event of Default. If, within ten business days (10)
after its receipt of such certificate, the Custodian shall not have received
written notice from Pledgor that it disputes the occurrence of such Event of
Default then the Custodian shall release to such Pledgee(s) a certificate or
certificates representing a percentage of the Pledged Shares equal to the ratio
of the original principal amount of such Pledgee's Note to the aggregate
original principal amount of all the Notes (with respect to any Pledgee, the
"Pro Rata Shares"). In the event that Pledgor does deliver a timely notice to
the Custodian that it disputes such determination, then Custodian shall release
the Pledged Shares solely in accordance with Section 9.2 below.

      9.2 In the event any dispute arises between Pledgor and any Pledgee,
Custodian shall release such Pledgee's Pro Rata Shares solely (i) upon its
receipt of the joint written instructions of the applicable Pledgee(s) and
Pledgor (which may be executed and/or transmitted in counterparts) or (ii) in
accordance with a final judgment or final court order from a court of competent
jurisdiction directing disposition of the applicable Pledged Shares (a "Court
Order"). A judgment or order under any provision of this Agreement shall not be
deemed to be final until the time within which an appeal may be taken therefrom
has expired and no appeal has been taken, or until the entry of a judgment or
order from which no appeal may be taken. Custodian shall be entitled to receive
and may conclusively rely on an opinion of counsel to the presenting party to
the effect that a Court Order as referred to in this Section is final and
nonappealable and from a court of competent jurisdiction.

      10. Custodian

      10.1 Custodian undertakes to perform only such duties as are expressly set
forth herein.

      10.2 Custodian may rely and shall be protected in acting or refraining
from acting upon any notice, instruction or request furnished to it in writing
hereunder and reasonably believed by it to be genuine and to have been signed or
presented by the proper party or parties.

      10.3 Custodian shall not be liable for any action taken by it in good
faith without gross negligence, and may consult with counsel of its own choice
and shall have full and complete authorization and protection for any reasonable
action taken or suffered by it hereunder in good faith and in accordance with
the written opinion of such counsel.

      10.4 Custodian may resign and be discharged from its duties or obligations
hereunder by giving notice in writing of such resignation specifying a date (not
less than thirty (30) days after the giving of such notice) when such
resignation shall take effect, and by transferring all funds then held by it
pursuant to this Agreement to the successor custodian. Promptly after such
notice, Pledgor and Pledgees shall by mutual agreement appoint a successor
custodian, such custodian to hold the Pledged Shares upon the resignation date
specified in such notice. If a successor custodian is not appointed within
thirty (30) days, Custodian shall have the right to petition any court of
competent jurisdiction for the appointment of a successor custodian. Pledgor and
Pledgees may by mutual agreement at any time substitute a new custodian by
giving fifteen (15) days' notice thereof to the Custodian then acting. Custodian
shall continue to serve until its successor accepts the responsibility of
Custodian and receives delivery of the Pledged Shares.

                                       4
<PAGE>

      10.5 Pledgor and Pledgees agree, jointly and severally, to indemnify
Custodian for, and to hold it harmless against, any loss, liability or expense
incurred by it, arising out of or in connection with its entering into this
Agreement and carrying out its duties hereunder, including the costs and
expenses of defending itself against any claim of liability in the premises,
other than as incurred by reason of its willful or reckless misconduct or bad
faith. The provisions of this section shall survive the resignation or removal
of Custodian and the termination of this Agreement.

      10.6 Custodian's duties hereunder may be altered, amended, modified or
revoked only by a writing signed by Pledgor, Pledgees and Custodians.

      10.7 Custodian is hereby expressly authorized to disregard any and all
warnings given by any of the parties hereto or by any other person or
corporation, excepting only orders or process of courts of law and is hereby
expressly authorized to comply with and obey orders, judgments or decrees of any
court. In case Custodian obeys or complies with any such order, judgment or
decree, Custodian shall not be liable to any of the parties hereto or to any
other person, firm or corporation by reason of such decree being subsequently
reversed, modified, annulled, set aside, vacated or found to have been entered
without jurisdiction.

      10.8 Custodian has acted as legal counsel for Pledgees, and may continue
to act as legal counsel for Pledgees, from time to time, notwithstanding its
duties as Custodian hereunder. Pledgor consents to Custodian acting in such
capacity as legal counsel for Pledgees and waives any claim that such
representation represents a conflict of interest on the part of Custodian.
Pledgor understands that Pledgees and Custodian are relying explicitly on the
foregoing provision in entering into this Agreement. Notwithstanding the
foregoing, Custodian shall not represent Pledgees in any proceeding resulting
from Custodian delivery of the Pledged Securities into court as contemplated in
Section 9.2 hereof.

      10.9 Pledgees shall pay the fees and costs of the Custodian under this
Agreement.

      11. Notices.

      Notices, requests, instructions or other documents to be in given under
this Agreement shall be in writing and shall be deemed given and received, (i)
when sent if sent by facsimile, provided that the fax is promptly confirmed by
telephone confirmation thereof, (ii) when delivered, if delivered personally to
the intended recipient, and (iii) one business day later, if sent by overnight
delivery via a national courier service, and in each case, addressed to a party
at the following address for such party:

                                       5
<PAGE>

             if to Pledgor:

                      Advanced Communications Technologies, Inc.
                      420 Lexington Avenue, Suite 2739
                      New York, NY  10170
                      Attention:  Wayne Danson, Chief Executive Officer
                      Facsimile:  646.227.1666

             With a copy to:

                      Eckert Seamans Cherin & Mellott, LLC
                      1515 Market Street - 9th Floor
                      Philadelphia, PA  19102
                      Attention:  Gary A. Miller, Esquire
                      Facsimile:  215.851.8383

             if to any Pledgee:

                      to the address set forth below such Pledgee's
                      name on the signature pages hereto

             with copies to:

                      Quarles & Brady Streich Lang LLP
                      Renaissance One
                      Two N. Central Avenue
                      Phoenix, Arizona  85004-2391
                      Attention:  Christian J. Hoffmann, III, Esquire
                      Fax:  602-420-5008

or to such other persons or addresses as may be designated in writing by the
party to receive such notice as provided above.

      12. Miscellaneous.

      12.1 No course of dealing between Pledgor and Pledgees, nor any failure or
delay in exercising any right, power or privilege hereunder shall operate as a
waiver of such right, power or privileges.

      12.2 THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE INTERNAL LAWS OF THE STATE OF NEW YORK, AND THE PARTIES AGREE AND CONSENT TO
THE EXCLUSIVE JURISDICTION OF THE FEDERAL AND STATE COURTS LOCATED IN NEW YORK
COUNTY, NEW YORK IN ANY ACTION OR PROCEEDING HEREUNDER, AND TO SERVICE OF
PROCESS BY CERTIFIED MAIL, RETURN RECEIPT REQUESTED (WHICH SHALL CONSTITUTE
"PERSONAL SERVICE"). The parties hereto hereby irrevocably waive, to the fullest
extent permitted by applicable law, any and all right to trial by jury in any
legal proceeding arising out of or relating to this agreement.

                                       6
<PAGE>

      12.3 This Agreement shall inure to the benefit of the successors and
assigns of each Pledgee. This Agreement shall be binding upon each of the
successors and assigns of Pledgor.

      12.4 This Agreement contains or refers to the entire agreement of the
parties with respect to its subject matter, and supersedes any prior
arrangements or understandings between the parties with respect thereto. Any
waiver, modification, discharge or termination of this Agreement must be in
writing and signed by the parties necessary to the enforcement thereof.

                                       7
<PAGE>

      IN WITNESS WHEREOF, and intending to be legally bound by this Agreement,
each of the parties hereto has caused this Agreement to be executed and
delivered as of December 30, 2005. PLEDGOR:

ATTEST:                                              ADVANCED COMMUNICATIONS
TECHNOLOGIES, INC.

                                                     By: /s/ Wayne I. Danson
--------------------------------------------            ------------------------
                                                         (Authorized Signature)

                                                     Name:    Wayne I. Danson
                                                          ----------------------
                                                             (Printed or Typed)
                                                     Title:     President
                                                           ---------------------
                                                     Date:    December 30, 2004
                                                          ----------------------

State of _____________________   :
                                  ss
County of ___________________    :

      On this _____ day of ______________2005, before me the subscriber, a
Notary Public in and for the State and County aforesaid personally appeared
___________________________, known or satisfactory identified to me, who
acknowledged that he/she was the ______________[title of office] of Advanced
Communications Technologies, Inc. and had executed the foregoing instrument in
such capacity in the name of and on behalf of such corporation for/ the purposes
stated therein.

      Witness my hand and seal the day and year aforesaid.
 [Notarial Seal]

                                                          ----------------------
                                                               Notary Public

                        Signatures continue on next page

                                       8
<PAGE>

                                    PLEDGEES:

ATTEST:

                                                      /s/ Theodore S. Li
--------------------------------------------         ---------------------------
                                                     Theodore S. Li

                                                     Address:

                                                     /s/ Hui Cynthia Lee
                                                     ---------------------------
                                                     Hui Cynthia Lee

                                    Address:

                                       9
<PAGE>

State of _____________________   :
                                  ss
County of ___________________    :

      On this _____ day of ____________2005, before me the subscriber, a Notary
Public in and for the State and County aforesaid personally appeared Theodore S.
Li known or satisfactory identified to me, who acknowledged that he had executed
the foregoing instrument for the purposes stated therein.

                  Witness my hand and seal the day and year aforesaid.

[Notarial Seal]
                                                        ------------------------
                                                              Notary Public

                                       10
<PAGE>

State of _____________________   :
                                  ss
County of ___________________    :

      On this _____ day of ____________2005, before me the subscriber, a Notary
Public in and for the State and County aforesaid personally appeared Hui Cynthia
Lee known or satisfactory identified to me, who acknowledged that she had
executed the foregoing instrument for the purposes stated therein.

                  Witness my hand and seal the day and year aforesaid.

[Notarial Seal]

                                                              Notary Public

                                       11
<PAGE>

                             IRREVOCABLE STOCK POWER

      FOR VALUE RECEIVED, ADVANCED COMMUNICATIONS TECHNOLOGIES, INC. does hereby
sell, assign and transfer to , shares of the common stock of PACIFIC MAGTRON
INTERNATIONAL CORP., a _____________corporation, represented by Certificate(s)
No(s) _________________ inclusive, standing in the name of ADVANCED
COMMUNICATIONS TECHNOLOGIES, INC. on the books of PACIFIC MAGTRON INTERNATIONAL
CORP. ADVANCED COMMUNICATIONS TECHNOLOGIES, INC. does hereby irrevocably
constitute and appoint _______________________ attorney to transfer the said
stock or bond(s) as the case may be, on the books of PACIFIC MAGTRON
INTERNATIONAL CORP., with full power of substitution in the premises.

                               ADVANCED COMMUNICATIONS
                               TECHNOLOGIES, INC.

                               By:                                      (SEAL)
                                  --------------------------------------

                               Dated:                                   , 200__
                                     -----------------------------------

                                       12

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