Smoke Detector, Gas Detector, Bluetooth Module manufacturer / supplier in China, offering Factory Price Photoelectric Sensor Mini Smoke Detector with 10 Years Battery for Fire Alarm, Conventional Sounder for Fire Alarm System Siren with Flasher 12V/24V/220V Strobe Light for Fire, Carbon Monoxide Alarm Sumring Fire Detector Co Smoke Detection LCD Display Alarm and so on.