Fire Alarm Smoke Detector, Gas Leak Detector, Carbon Monoxide Detector manufacturer / supplier in China, offering 85dB Audible Alarm 3V Lithium Battery Powered Smoke Detector, CE and Rohs Approved, As3786 Compliantphotoelectric Smoke Detector with Battery Power 10-Year Life Time, CE and Rohs Approved Conventional Photoelectric Smoke Detectors for Fire Alarm Systems and so on.