Technical specifications:

Wireless Smoke Detector, Adopt on smoke detector element with siren, it can work individually as well as with other alarm systems.

Power supply:DC9V battery

Working frequency: 315MHz/433MHz 

Alarm current: <25 mA  

Static current: <20 uA 

Alarm volume: >95db  

Relative humidity: >85 %   

Size: 145x100x 42mm  

N.W.: 160g