Mini Wireless 85DB Optical Stand Alone Smoke Detector / Sensor

Stand Alone Smoke Detector Fire Alarm Security products OC424S Quick Detail: 1 ,Stand Alone smoke detector Fire alarm 2, Protection area 6m high,6 0 ㎡ 3, CE & RoHs certification 4, Optical sensor 5, Alarm Sound over 85DB Description: Photoelectric technology is generally more sensitive than ionization technology at detecting large particles, which tend to be produced in greater a mounts by smoldering fires , which may smolder for hours before bursting into flame . Sources of