ROISCOK Electronics LTD. is an intruder alarm products manufacturer in shenzhen, China, since 1989. 

We supply high quality products as follows:
A. Control Panels; 
B. Wired Detectors,including Dualtech/Ceiling PIRs/Curtain PIRs;
C. Wireless PIRs and receivers;
D. Environmental Detectors,such as Gas/Smoke/Vibratory Detectors/Strong Electricity Inbreak Detector;
E. Magnetic Door Contacts;
F. Beam Sensors series;
G. Siren series;
H. Accessories;

Http://www.roiscok.com