Working Voltage:DC9V(battery supply) Working current :monitor state less than 12uA, alarm state less than 5mA. Alarm loudness: distance 3m;loudness not than 85db. Ambient condition temperature: -10C----+60C Relative humidity <=95% Protective area: the height of installation for less than six meter, protective area for more than sixty square meter. Physical dimension: 120mm*45mm Weight: 153g Packing: 120pcs/carton Deliver time: 20days guarantee: 5years CE Approved