... (when not charging) Alarm current:<120mAl Built-in Li-Ion backup battery: 3.7V 800mAH(rechargeable), Standby: around 24 hours, Full charging ... control,1 pir sensor,1 door sensor, 1 adaptor,1 backup battery, 1 siren. 1 English manual book.Product Picture: Shipping Method:1 ... 800mAH home security system with Lcd touch screen Li-Ion backup battery 3.7V 800mAH home security system with Lcd touch screen ...