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Exhibit 4.20
  CONFIDENTIAL
 (CHINESE CHARACTER)Zastron Electronic (Shenzhen) Company LimitedGusu Industrial Estate,Xixiang, Baoan,Shenzhen, PRC
    
    7 June 2007
   Banking Facilities
Customer No. 002-095495
 31 May 2008.
 Borrower:
 
 Lender:




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Zastron Electronic (Shenzhen) Company Limited
    
    7 June 2007
 Facility/ Amount
 New
    
    PreviousTranche I
    
    Import Facilities
    
    USD10,000,000.-
    
    USD15,000,000.-Documentary Credits to your
Suppliers and Import Loan
Facilities in either USD or
Foreign Currency (HKD or JPY) for
up to 120 days less any usance /
Credit periods granted by your
suppliers.within whichGoods under
your control and/or Trust
Receipts.
    
    (USD10,000,000.-)
    
    (USD15,000,000.-)
 Term:
  Interest
  Commission:
  New
    
    PreviousFor DC amount below USD100k or its equivalent
    
    
    0.10
    %
    
    
    0.12
    %For DC amount between USD100k (USD100k inclusive) and USD250k or
its equivalent
    
    
    0.08
    %
    
    
    0.10
    %For DC amount between USD250k (USD250k inclusive) and USD400k or
its equivalent
    
    
    0.06
    %
    
    
    0.08
    %For DC amount above USD400k (USD400k inclusive) or its equivalent
    
    
    0.04
    %
    
    
    0.06
    %
 Default Interest:




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Zastron Electronic (Shenzhen) Company Limited
    
    7 June 2007
 Prepayment:
  Security
     (i)
    
    upon the realisation of any foreign guarantee/security in respect of this facility, it shall
conduct foreign debt registration with the local State Administration of Foreign Exchange
(SAFE) in a timely manner but in no event later than 15 days after realisation of such
foreign guarantee/security;(ii)
    
    to procure the successful registration with SAFE as mentioned in the foregoing item (i), the
Borrower shall ensure that it has sufficient borrowing gap at the time of the registration of
the realised foreign guarantee/security;(iii)
    
    throughout the term of the facility and as long as the facility is existing or any
indebtedness under the facility is outstanding, the Borrower shall keep the Lender informed of
the amount of its borrowing gap (calculated as the balance of (i) its approved total
investment amount less (ii) its registered capital) and shall forthwith advise the Lender of
any change in the borrowing gap; and(iv)
    
    the Borrower shall take all necessary measures to ensure that all the indebtedness owed to
the Lender under this facility be fully settled in the same currency as that of such
indebtedness.




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Zastron Electronic (Shenzhen) Company Limited
    
    7 June 2007
 Conditions Precedent:
 1)
    
    The Borrower shall present to the Lender a valid Borrowing Card issued by the Peoples Bank
of China.2)
    
    Certified true copies of all government approvals and certificates in relation to the
establishment of the Borrower shall be submitted to the Lender.3)
    
    The Borrower has provided its internal authorization document (such as shareholders
resolution, board resolution) approving (or authorizing others to approve) the facilities
hereunder and authorizing representative(s) to accept and sign the terms, conditions and
documents in connection with the facilities hereunder in strict compliance with its articles
of association and the PRC Company Law (or equivalent or similar law if the Borrower is a
foreign entity).4)
    
    In the event that the Lenders making available any facility hereunder is subject to
regulatory approval or the completion of other procedures with the regulator(s), the
acquisition of such regulatory approval and the completion of such procedures with
regulator(s).5)
    
    The Lender is satisfied that all the security(ies) stated in the Security item above (if
any) has/have been established and is/are valid and enforceable. The security providers
internal authorization document (such as shareholders resolution, board resolution)
approving (or authorizing others to approve) the provision of the Security and authorizing
representative(s) to accept and sign the terms, conditions and documents in connection with
the Security in strict compliance with its articles of association and the PRC Company Law
(or equivalent or similar law if the security provider is a foreign entity) has been duly
made and submitted to the Lender.6)
    
    The appendix to the facility letter, which relates to the Lenders storage and processing of
customers information shall form an integral part of the facility letter and be
binding on the Borrower.
 Other Conditions:
 1)
    
    Without prejudice to any security or other priority right to which the Lender is entitled (if
any), this facility shall rank at least pari-passu with all present and future borrowings of
the Borrower. The Borrower undertakes to advise the Lender in advance of any future
borrowings.2)
    
    The Borrower should not create or attempt to create or permit to subsist any mortgage,
debenture, charge, pledge, lien or other encumbrance upon, or permit any lien or other
encumbrance (save a lien arising by operation of law in the ordinary course of trading) on the
whole or any part of present or future assets of the Borrower without Lenders prior written
consent..3)
    
    Audited yearly financial statements of the Borrower and the Guarantor to be prepared by
qualified accountants shall be provided to the Lender whenever available but in any event no
later than 120 days from the financial year-ends.4)
    
    Other financial or operational information of the Borrower as from time to time reasonably
requested by the Lender.5)
    
    We may, at our sole and absolute discretion, refuse to allow drawings under the facilities if
the transaction in question does not meet our operational requirements in respect of these
facilities




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Zastron Electronic (Shenzhen) Company Limited
    
    7 June 2007
 Termination Event
  Expenses:
  Taxation and Deduction
  Assignment
  Governing Laws:
  Jurisdiction
  (i) Section 83 of the HK Banking Ordinance and (ii) the CBRC Administration Rules on the
Connected Transactions of Commercial Banks with Insiders and Shareholders (the CBRC Rules on
Connected Transactions):




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Zastron Electronic (Shenzhen) Company Limited
    
    7 June 2007
     
 Faye Zhou
    
    
    
    Sunny PoonVice President
    
    
    
    Senior Vice President & Division HeadCommercial Banking
    
    
    
    Commercial Banking/apAccepted byZastron Electronic (Shenzhen) Company Limited.(Authorised signature with chop)




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Zastron Electronic (Shenzhen) Company Limited
    
    7 June 2007
 Appendix
  (a)
    
    in connection with any proposed or existing transaction between you and the Bank, the Bank
may request you to supply (or arrange to supply) the Bank with information relating to
yourself(ves), your directors, shareholders or other officers, as well as proposed or actual
guarantors or security providers (if any) (the Information);(b)
    
    such Information may be used by the Bank for the purpose of conducting credit and other
checks on you, evaluating any proposed, existing or past transaction between you and the Bank,
formulating an offer for any such proposed or existing transaction or for any other purpose
relating to any such transaction, and/or for the purpose of promoting, improving and
furthering the provision of other financial services by the Bank and any other member of the
HSBC Group to you generally, and/or for any other purpose as in accordance with the Banks
general policy on disclosure of information as may be notified to you from time to time;(c)
    
    such Information will be kept confidential but the Bank may provide such Information to any
of the following parties for the purposes set out above (without the need to giving any
further notice to the individuals to whom such Information relates ):(i)
    
    any agent, contractor or third party service provider (whether situated within or outside the
Peoples Republic of China) which provides administrative, telecommunications, computer,
payment, processing or other services to the Bank in connection with the operation of its
business;(ii)
    
    credit reference agencies;(iii)
    
    any person to whom the Bank is under an obligation to make disclosure under the requirements
of any applicable laws, regulations, rules or judicial process;(iv)
    
    any actual or proposed participant or sub-participant of any proposed or existing transaction
between you and the Bank;(v)
    
    any of the Banks officers and employees;(d)
    
    you shall ensure that all the persons as referred to in (a) above, whose personal or other
data have been included in the Information provided to the Bank, have consented to the
provision of such data to the Bank for such purposes and for disclosure to such persons as
referred to in this letter;(e)
    
    if you maintain an account/accounts with the Bank, you shall be further subject to any
provisions in those terms and conditions applicable to such account(s) on the Banks storage
and processing of the customers and other information. These account terms and conditions,
the provisions referred to in this letter as well as any other agreement between you and the
Bank relating to the Banks storage and processing of the customers and other information
shall supplement, rather than conflict with, each other;(f)
    
    the Bank may retain any such Information for any time period as it considers necessary or
desirable (whether or not you have ceased to be a customer or potential customer of the Bank),
and all the provisions in this letter shall remain effective during the whole retention period
of such Information.