- HK Advanced Communication Co. Ltd
- Address:Suites 4504-11, Natwest Tower, Times Square, 1 Matheson Street, Causeway Bay
- M Tech Mfg. Ltd.
- Address:Rm 605, New East Ocean Ctr. 9 Science Museum Rd. ,
- Theo International Co., Ltd.
- Address:Room 17, 6 / F, Block B Hi-Tech Industrial Centre
- CARRIE ELECTRIC CO.,LIMITED
- Address:50 Bonham Strand East
- ZAPTRON LIMITED
- Address:Astoria Building, Tst. Kowloon.
- Castel Telecmmunications Holdings Co., Ltd.
- Address:Science Park East Ave