... Big LCD displays2. GSM+PSTN dual net Li-Ion backup battery 3.7V 800mAH home security system with ... when not charging) Alarm current:<120mAl Built-in Li-Ion backup battery: 3.7V 800mAH(rechargeable), Standby: around ... Main alarm set, 2 wireless remote control,1 pir sensor,1 door sensor, 1 adaptor,1 backup ... home security system with Lcd touch screen Li-Ion backup battery 3.7V 800mAH home security system ...