Technical Parameters Power:DC12V/1.2A Status current:≤30mA GSM bands:850/900/1800/1900MHz Wireless receiving frequency:433MHz ± 0.5Mhz Receiving code:ASK Wirelss distance:no obstacle 80m Working temperature:+10~+45â„� Working humidity:≤90% Backup battery:7.4V/500mAh