| Bissnesss Name | Address |
|---|---|
| Kwok On Electronics Limited | G/F, 63 Sun On Village, Sai Kung |
| Calibe Systems Engineering Limited | Room 612, 6/F, Wellborne Commercial Centre, 8 Java Road , North Point |
| Vision Engineering (Hong Kong) Limited | Room 16, 10/F, Yale Industrial Centre, 61-63 Au Pui Wan Street, Fo Tan, Sha Tin |
| Right Zone Limited | Room 9, Block B, 8/F, Hoi Luen Industrial Centre, 55 Hoi Yuen Road, Kwun Tong |
| Greatwood Limited | Flat B, 2/F, Tung Kin Factory Building, 196-198 Tsat Tsz Mui Road, North Point |
| Tokey Communications Service Limited | Flat B, 7/F, Fook Shing Industiral Building, 1A Yuk Yat Street, To Kwa Wan |
| KML Engineering Limited | Flat B12, G/F, Flat B5, B7, B9-B11, 1/F & Flat B7, 3/F, Shatin Industrial Centre, Siu Lek Yuen Road, Sha Tin |
| Magarita Company Limited | G/F, Yuen Wah Building, Whampoa Estate, 27B Tak Man Street, Hung Hom |
| Huge Link Engineering Limited | Room 7, 5/F, Ming Fat Industrial Centre, 1 Kin Fat Street, Tuen Mun |
| Shun Ngai Engineering Limited | Room 3, Block F2, 5/F, Hang Fung Industrial Building, Phase 2, 2G Hok Yuen Street, Hung Hom |
| Speedy Electronic Company Limited | Room 1504, 15/F, Prosper Commercial Building, 9 Yin Chong Street, Mong Kok |
| J & S Security System Company Limited | Shop 1, G/F, Po Fung Building, 1-7 Hop Yick Road, Yuen Long |
| Reda Technology Limited | Flat 903A, 9/F, Trade Square, 681 Cheung Sha Wan Road, Cheung Sha Wan |
| Top Win Security Systems Limited | Room 5, 3/F, Block H, Kaming Factory Building, 688-690 Castle Peak Road, Lai Chi Kok |
| Tsun Loong Group Limited | Flat B1, 3/F, Po Yip Building, 23 Hing Yip Street, Kwun Tong |
| Airlink (Hong Kong) Limited | Room 602, Delta House, 3 On Yiu Street, Sha Tin |
| Hot Hit Technologies Limited | G/F, 150A Apliu Street, Sham Shui Po |
| Delight Technology Company Limited | Room 1016, Vanta Industrial Centre, 21-33 Tai Lin Pai Road, Kwai Chung |
| INFA Systems Limited | 17/F, 169 Electric Road, North Point |
| GTECH Services (Hong Kong) Limited | Room 2403-08, 24/F, C C Wu Building, 302-308 Hennessy Road, Wan Chai |
| Integrated Corp | Kai Tak Coml Bldg, Sheung Wan |
| Media-Go Engineering Limited | 25/F, Westin Centre, 26 Hung To Road, Kwun Tong |
| Abasco Limited | 22/F, Concord Commercial Building, 155-157 King's Road, North Point |
| Microtronic Security Systems Limited | Room 1301, 13/F, Java Commercial Centre, 128 Java Road, North Point |
| Cypress Systems Limited | Unit 515-516, 5/F, Lakeside 1, Hong Kong Science Park, Sha Tin |