... ) Alarm current:<120mAl Built-in Li-Ion backup battery: 3.7V 800mAH(rechargeable), Standby: around 24 hours ... sensor,1 door sensor, 1 adaptor,1 backup battery, 1 siren. 1 English manual book.Product Picture ... methods are also available, such as EMS, UPS, HONGKONG POST, etc. You can choose the most suitable for ... system with Lcd touch screen Li-Ion backup battery 3.7V 800mAH home security system with Lcd ...