Fire Alarm & Smoke Detector, Alarm & Security Systems, Carbon Monoxide Alarm manufacturer / supplier in China, offering AC Mains Powered Interconnected Smoke Alarm Detector with 10-Year Built-in Backup Battery, En14604 En50291 Smoke and Carbon Monoxide Combo 2 in 1 Detector Fire Alarm, Wireless 10 Year Battery Cr-123A Smoke Alarm Fire Detector for Home Safety and so on.