Main features:

1.. Working voltage: 24V
2.Alarm current: 30mA
3.Operating temperature: -10 ~ 60 ℃
4.Sound pressure: 85dB
5.Alarm mode: independent alarm
6.Back-up battery: need OEM
7.Environmental humidity: ≤ 95% RH
8.Product Size: 127 * 121 * 101mm