| Bissnesss Name | Address |
|---|---|
| Win-Tech Engineering Company Limited | Rooms 419-421, 4/F, Block 1, Hoi Tai Factory Estate, Kin Fat Street, Tuen Mun |
| E-Automation Technology Coompany Limited | Flat E1, 6/F, Summit Building, 30 Man Yue Street, Hung Hom |
| Energetic System Co Limited | Flat 5A, 11/F, Well Fung Industrial Centre, 68 Ta Chuen Ping Street, Kwai Chung |
| ATAL Engineering Limited | 13/F, Island Place Tower, 510 King's Road, North Point |
| Analogue Technical Agencies Limited | 12/F & 13/F Island Place Tower, 510 King's Road, North Point |
| Telecom & Works Eng Co Limited | 4/F, Hing Lee Industrial Building, 89 Bedford Road, Tai Kok Tsui |
| Antex Electronic Technology (HK) Limited | Flat B, Block 4, 18/F Golden Dragon Industrial Building 182-190 Tai Lin Pai Road, Kwai Chung |
| Safemark Alliance Security Co Limited | Room 608, Yu To Sang Building, 37 Queen's Road Central, Central District, Central |
| Honor Success Engineering Limited | Room 6, Block C, 4/F, Phase 1, Yip Fat Factory Building, 77 Hoi Yuen Road, Kwun Tong |
| Alarmpro Ltd | 7 Shing Yip St, Kwun Tong |
| Andy (HK) Limited | Unit J, 13/F, Tsun Win Factory Building, 60 Tsun Yip Street, Kwun Tong |
| Ademco Asia Pacific Limited | Room 16A, CDW Building, 388 Castle Peak Road, Tsuen Wan |
| PP Management Consultants Company Limited | Room 5, 20/F, Fullagar Industrial Building, 234 Aberdeen Main Road, Aberdeen |
| World Trade Centre Customer Care Centre | World Trade Centre, Causeway Bay |
| Century Mark Management Services Limited | 3/F, Won Hing Building, 74-78 Stanley Street, Central District, Central |
| Century Property Management Limited | Room 10, 12/F, Laurels Industrial Centre, No. 32 Tai Yau Street, San Po Kong |
| CBRE HK Limited | 3/F & 4/F, Three Exchange Square, 8 Connaught Place , Central District, Central |
| Japsignal Property Management Company Limited | Room 08, 13/F, Rightful Centre, 12 Tak Hing Street, Jordan |
| Taikoo Shing (Management) Limited | Tang Kung Mansion, Tai Koo Shing, 31 Tai Koo Shing Road, Quarry Bay |
| Sunpeace Property Management Limited | Room 607, 6/F, Lippo Sun Plaza, 28 Canton Road, Tsim Sha Tsui |
| Grandful Management Limited | Room 2608, 26/F, Fook Yip Building, 53-57 Kwai Fung Crescent, Kwai Chung |
| Swire Properties Management Limtied | 64/F, One Island East, 18 Westlands Road, Quarry Bay |
| Success Security System Ltd | Henley Ind Centre, Mong Kok |
| Ng Ping Wah | Cheong Sing Bldg, Yuen Long |
| HIS Technologies Limited | Unit 308B, 3/F, Core Building 1, 1 Science Park East Avenue, Hong Kong Science Park, Sha Tin |