Fire Alarm & Smoke Detector, Alarm & Security Systems, Carbon Monoxide Alarm manufacturer / supplier in China, offering BS5446 Standard Heat Detector Interlinked Alarm with 10-Year Built-in Battery, Activfire As3786 Standard AC Mains Powered Interconnected Smoke Detector Easy Installation with Backup Battery 3V, Activfire As3786 Standard AC Mains Powered Interconnected Smoke Detector Easy Installation with Backup Battery 9V and so on.