Wireless Alarm Smoke Detector / Sensor Can Connect with GSM Alarm System . High Quality GSM Wireless Burglar Alarm Home Security Systems Voice + LCD Auto
Home Security System Wireless Smoke Detector Fire Alarm
Home Security System Wireless Smoke Detector Fire Alarm This small gadgets will alert and warn people stay far away from danger field when it detected smoke. 100% Brand New. It can detects the smoke by a couple of infrared diodes. The principle of detecting is granule in the smoke can reflect infrared light. Infrared diodes are placed in the special chamber. The chamber can shield external light, but don’t affect the smoke into it. High signal. In order to reduce the interferenc
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