Working Voltage: 9V battery;
Battery Life: About 1 year (counted at 3 times each day);
Wireless Frequency : 433 MHZ
Transmission Range: 100m
Working Current (mA): 10-30
Static Current(uA): 10
Smoke sensitivity: in accordance with UL Standard 217;
Operating temperature: -10degree - +50degree;
Relative humidity: <95% ;
Size: (R X H) 107 X 36mm.