Fire Alarm & Smoke Detector, Alarm & Security Systems, Carbon Monoxide Alarm manufacturer / supplier in China, offering En14604 & En50194 Certified AC Mains Interconnected Smoke and Co Combination Detector Alarm with Backup 10-Year Battery for Residential & Commercial Use, Home Security Temperature Alarm 10 Years Battery Back up, Home Security Heat Alarm System BS5446-2 Certified Temperature Detector and so on.