HKCRRT Secretariat
Address: Room 1101, 11/F., 9 Chong Yip Street, Kwun Tong, Kowloon.
Tel: 2805 1278 Fax: 2772 0730
Email: info@hkcrrt.org
Contact person: Miss Kiki Yuen
If you are concerned about your security then https://www.jammer-store.com/camera-blockers-jammers/ is the best option for you.