GeneralDG822 Battery Powered Photoelectric Smoke Alarm with excellentstabilityand high-sensitivity by Advanced MCU ExpertAlgorithmSoftware.KeySpecifications/Special Features
?AdvancedMCU ExpertAlgorithm Software to prevent the most smoke alarmfault.
?Power Source:9VBattery (included).
?Audio Alarm:≥85dB/3m
?Temperature Range: 0℃to40℃
?HumidityRange: 5%-95%relative humidity(RH)
?Sensor:Photoelectric
?Size:diameter 105mm indiameter x59mm depth
?Interconnects:Yes
?Easy toinstallwith mounting base included
?Suitable foranyroom
?Lowbatterysignal
?Test buttonforsimple testing