Fire Detector Power Source: 9V Battery (included).

Audio Alarm: ≥ 85dB/3m

Temperature Range: 0℃ to 40℃

Humidity Range: 5%-95% relative humidity(RH)

Sensor: Photoelectric

Size: diameter 105mm in diameter x59mm depth

Interconnects: Yes

Easy to install with mounting base included

Suitable for any room

Low battery signal

Test button for simple testing  

smoke detector and smoke alarm ,cheap fire smoke detector ,home fire smoke dectecotr