Exhibit 10.2(b)


                         AMENDMENT TO LICENSE AGREEMENT

     Amendment to License Agreement,  dated as of April 21, 2004, by and between
Pro Tech  Communications,  Inc.,  a Florida  corporation  with  offices  at 4492
Okeechobee  Road, Fort Pierce,  Florida 34947 USA ("Pro Tech"),  and NCT Hearing
Products,  Inc.,  a Delaware  corporation  with  offices  at 20 Ketchum  Street,
Westport, Connecticut 06880 USA ("NCT Hearing").

     WHEREAS Pro Tech and NCT Hearing are parties to a License Agreement,  dated
as of September 12, 2000 (the "License Agreement"); and

     WHEREAS Pro Tech and NCT Hearing  wish to amend the  License  Agreement  to
expand the scope of the license granted therein;

     NOW  THEREFORE,  in  consideration  of the mutual  promises  and  covenants
contained  herein and other good and  valuable  consideration,  the  receipt and
sufficiency of which are hereby acknowledged,  Pro Tech and NCT Hearing agree as
follows:

1.   Section  1.6 of the  License  Agreement  is hereby  amended  to read in its
     entirety as follows:

     1.6  "Licensed  Products" shall mean exclusively those at the ear listening
          and communication devices, including related accessories, which embody
          or employ all or part of the  Licensed  Patents  and/or  the  Licensed
          Technology.

2.   Section  1.8 of the  License  Agreement  is hereby  amended  to read in its
     entirety as follows:

     1.8  "Market" shall mean the worldwide market for Licensed Products.


3.   A new Section 2.7 is hereby added to the License Agreement,  to read in its
     entirety as follows:

     2.7  Trademark   License.   NCT   Hearing   hereby   grants  Pro  Tech  the
          non-exclusive right, in making,  using,  distributing,  selling and/or
          having sold Licensed Products in the Market, to utilize the trademarks
          and service marks "NOISEBUSTER,"  "PROACTIVE" and "CLEARSPEECH" to the
          extent, and subject to the terms and conditions, set forth in Schedule
          E to this Agreement.  To the extent of any inconsistency  between such
          Schedule E and the body of this  Agreement,  Schedule E shall  govern.
          NCT Hearing hereby  represents to Pro Tech that it is a  non-exclusive
          licensee of such trademarks and service marks from NCT Group, Inc.

4.   A new Schedule E is hereby added to the License  Agreement,  to read in its
     entirety as set forth in Schedule E annexed to this Amendment.

5.   Pro Tech shall  immediately issue to NCT Hearing Nine Million Eight Hundred
     Twenty-One  Thousand  Four Hundred  Twenty-Nine  (9,821,429)  shares of its
     common  stock,  par value  $.001 per share (the  "Amendment  Shares").  The
     Amendment Shares, upon issuance, shall be duly authorized,  validly issued,
     fully paid and non-assessable.  The Amendment Shares, upon issuance,  shall
     not be registered under the Securities Act of 1933, and the  certificate(s)
     representing  the Amendment  Shares shall contain a legend so stating.  NCT
     Hearing  hereby

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     represents to Pro Tech that it is acquiring  the  Amendment  Shares for its
     own account,  for investment only and not a view toward  distribution.  Pro
     Tech hereby  represents  and warrants to NCT Hearing that (a) Pro Tech is a
     corporation duly organized, validly existing and in good standing under the
     laws of the State of Florida; (b) the issuance by Pro Tech of the Amendment
     Shares as described  herein will not violate the Articles of  Incorporation
     or By-Laws of Pro Tech or any  judicial,  administrative,  governmental  or
     contractual  order or restriction by which Pro Tech is bound or require any
     third party  consent  which  consent will not have been  obtained;  (c) all
     reports  required to be filed by Pro Tech with the  Securities and Exchange
     Commission  (collectively,  the "Reports") have been so filed;  and (d) the
     Reports do not contain  any untrue  statement  of material  fact or omit to
     state a material  fact  required to be stated  therein or necessary to make
     the statements  therein not misleading in light of the circumstances  under
     which they were made.

6.   Each party  hereto  represents  and  warrants  to the other that it has the
     power and authority to enter into and perform this Amendment.

     Except as set forth  herein,  the License  Agreement  shall  remain in full
     force and effect.

     IN WITNESS  WHEREOF,  Pro Tech and NCT Hearing have executed this Amendment
as of the date first written above.

PRO TECH COMMUNICATIONS, INC.


By:  /s/ RICHARD HENNESSEY
   -----------------------------------
         Richard Hennessey
         President


NCT HEARING PRODUCTS, INC.


By:  /s/ IRENE LEBOVICS
   -----------------------------------
         Irene Lebovics
         President

--   To the extent  that the  consent of NCT Group,  Inc.  is  required  for the
     grants  of  rights   from  NCT   Hearing   Products,   Inc.   to  Pro  Tech
     Communications,  Inc.  contained  in the  foregoing  Amendment  to  License
     Agreement  (including  the new Schedule E), NCT Group,  Inc.  hereby grants
     such consent.

NCT GROUP, INC.


By:  /s/ IRENE LEBOVICS
   -----------------------------------
         Irene Lebovics
         President


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                                   Schedule E

              Trademark Sublicense from NCT Hearing Products, Inc.
                        to Pro Tech Communications, Inc.

1.   License. NCT Hearing grants to Pro Tech the non-exclusive right and license
     to use the trademarks and service marks described below (collectively,  the
     "Marks") in the Territory in  association  with Licensed  Products that are
     within  the  respective  categories  described  below  (collectively,   the
     "Trademark  Products") and that are manufactured or distributed (or, in the
     case of services,  provided) by Pro Tech or on Pro Tech's  behalf under its
     supervision.

-------------------------- -----------------------------------------------------
          Marks                            Trademark Products
-------------------------- -----------------------------------------------------
      NOISEBUSTER          Active noise reduction headphones and headsets
-------------------------- -----------------------------------------------------
      PROACTIVE            Active noise reduction headphones and headsets
-------------------------- -----------------------------------------------------
      CLEARSPEECH          Audio devices utilizing any of NCT's or NCT Hearing's
                           ClearSpeech noise and echo cancellation algorithms on
                           a digital signal processing platform
-------------------------- -----------------------------------------------------

     The quality of the Trademark Products shall at all times be satisfactory to
     NCT Hearing.

2.   Inspection.  Upon prior  reasonable  notice,  NCT  Hearing  may inspect the
     Trademark  Products  on the  premises  of Pro  Tech  (or,  in the  case  of
     services, through reasonable other means). Upon the request of NCT Hearing,
     Pro  Tech  shall  submit  to NCT  Hearing  samples  of (or,  in the case of
     services, documentation describing) the Trademark Products.

3.   Ownership  of  Marks.  Pro  Tech  acknowledges  that  NCT  Hearing  is  the
     non-exclusive licensee from NCT of the Marks, all registrations thereof and
     all applications for registration  thereof.  Pro Tech shall not do or cause
     to be done any act or thing  contesting  or in any way impairing or tending
     to impair any part of NCT's  ownership  interest or NCT  Hearing's  primary
     license.  Pro Tech shall not  represent  to any third party that it has any
     ownership in the Marks or in any  registration or registration  application
     relating  thereto.  Pro  Tech's  use of the Marks  shall not  create in Pro
     Tech's favor any ownership  interest in the Marks. All rights in and to the
     Marks not  expressly  granted to Pro Tech under this  Agreement  are hereby
     reserved by NCT Hearing for itself and NCT.

4.   Use of  Marks.  When  using  the  Marks,  Pro Tech  shall  comply  with all
     applicable  laws  pertaining to the use of trademarks and service marks and
     shall indicate that such Marks are  trademarks,  service marks,  registered
     trademarks or registered  service marks (as  appropriate) of NCT, or of NCT
     Hearing or Pro Tech as  licensee.  Pro Tech shall  provide NCT Hearing with
     samples of all  literature,  packaging  and  labeling  used by Pro Tech and
     containing the Marks.

5.   Transfer of Marks.  Pro Tech may not assign,  transfer or sublicense any of
     its rights under this  Agreement or authorize any other person or entity to
     use the Marks without NCT Hearing's prior written consent in each instance.


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6.   Maintenance of Marks.  If a Mark is registered with a governmental or other
     trademark  authority,  Pro Tech shall do nothing  that would or could cause
     the termination or invalidation of such  registration  and shall,  upon the
     request of NCT  Hearing,  cooperate  with NCT Hearing or NCT (at Pro Tech's
     expense)  in any effort by NCT Hearing or NCT to renew,  extend,  maintain,
     protect or prosecute such registration.  If a Mark is not registered with a
     governmental or other trademark authority in a geographic area in which Pro
     Tech uses or intends to use such Mark, Pro Tech shall,  upon the request of
     NCT Hearing,  cooperate with NCT Hearing or NCT (at Pro Tech's  expense) in
     any effort by NCT Hearing or NCT to register such Mark in such area.

7.   Indemnity. NCT Hearing assumes no liability to Pro Tech or to third parties
     with respect to the use of the Marks in the Territory or the performance or
     characteristics  of the  Trademark  Products.  In addition,  Pro Tech shall
     indemnify  and hold harmless NCT Hearing,  NCT,  their  affiliates  and the
     directors,  officers,  employees and agents of all thereof, against any and
     all losses,  damages and expenses,  including but not limited to reasonable
     attorneys'  fees,  incurred  as a result of or in  connection  with any (a)
     breach  by Pro Tech of any  provision  of this  Schedule  E, (b) claim by a
     third party  involving the  manufacture,  distribution  or provision of the
     Trademark Products by Pro Tech or its sublicensee or (c) use by Pro Tech of
     any of the Marks.

8.   Term  and  Termination.  The  grant  of  rights  in this  Schedule  E shall
     terminate  automatically  as of the date that NCT Hearing's  license in the
     Marks from NCT terminates.  NCT Hearing  represents to Pro Tech that, as of
     the date hereof,  such license from NCT is scheduled to last until July 26,
     2012.  NCT  Hearing  shall  give  Pro  Tech as much  advance  notice  as is
     practicable  under the circumstances in the event that its license from NCT
     terminates prior to such date.  Notwithstanding the foregoing,  NCT Hearing
     may, upon ten days' prior written notice to Pro Tech,  terminate the rights
     granted to Pro Tech in this  Schedule E (a) for the material  breach of the
     provisions of this  Schedule E by Pro Tech,  which  termination  shall take
     effect  unless Pro Tech cures such  breach  prior to the  effectiveness  of
     termination;  or (b)  without  cause,  if Pro Tech no longer  controls,  is
     controlled by or is under common control with NCT Hearing.  Upon expiration
     or any  termination  of the rights  granted to Pro Tech in this Schedule E,
     Pro Tech shall  cease all use of the Marks and shall not use any  trademark
     or service mark similar to or likely to be confused with any Mark.


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