... CE/ROHS alarm GSM Security Simple Wireless Alarm System,home security protection(LS-GSM-003) I. Security Alarm ... will not lost even the power is off14) Built-in NI-HI rechargeable battery,it will automaticly to begin ... work when the power is off II. Security Alarm System Standard packing:1 Main panel,1 GSM antenna,1 ... battery,could last about 1 year.1 Built-in backup battery,1 AC/DC Adapter,1 User manual. ...