ALEPH Security & Surveillance Technology Development Co., Ltd, a subsidiary of CSST, is specializing in manufacturing ALARM SYSTEMS, CCTV SYSTEMS AND ACCESS CONTROL. The product line includes Photoelectric Beam Detector, PIR, Control System, CCD Cameras, Speed Dome, DVR and Video Door Phone. In the overseas market, our products are sold more than 60 countries around the world.Product Range:alarm system, access control, PIR, infrared beam detector, photoelectric beam detector, electronics fence,electronic grating, emergency button, DVR, intelligent controllers, home burglar alarm series, video matrix, video door phone, Visual Intercom,IR camera, CCTV Camera, Security Camera, CCD Camera,Box Camera, night vision camera, varifocal IR camera, long range IR camera,dome camera, bullet camera,vandalproof camera,square camera,special camera, modulecamera, mini camera,PTZ