Power supply: AC100~240V 50/60Hz adapter
Built-in battery: 7.4V 400mAh lithium battery
Standby current: 15.5mA
Alarm current: <300 mA
Alarm volume: 120dB
Working temperature: -10°C～+50°C
Relative humidity: ＜ 95% (no condensation)
Wireless defense zone: 4
Wireless parameters: 433MHz, eV1527
Product size: 155×100×45mm