... Backup rechargeable battery inside, can work for 24hours when power off; Can be operated from anywhere, no distance limit; ... /1900Mhz , Optional: 850/1900/1800/1900MhzDC Power supplyStandard adapter: DC 12V/1.5A Power CurrentMax:500mA Type :50mASIM CardSupporting 3V SIM ... Gas Leak Sensor, Glass Break S, , ensor, Shock Sensor, Power failure sensor, etc.The PC Programmer Interface Wireless Remote Control ...