This product is photoelectric type, and works on the principle that infrared scatters in the smoke to probe the smoke which is generated by both the incomplete combustion and combustion at the initial stage of the fire. The detecting chamber adopts special structure design and signal processing identification technology. It fits for indoor enviroment such as family use and public place.

Advantage: 5y lithium battery included, mini size

Working Voltage: DC9V(CR2450 3VX3)
Current: Quiescent Current: ≤ 10uA
Alarming Current: ≤ 20mA
Alarming Decibel: ≥ 85dB/3m
LED Indicator: LED(Red)
Low voltage Alarming: ≤ 7.3V
Working Temperature: -10º C~+40º C
Working Humidity: ≤ 95%RH
Diameter: 72x37mm