Detailed Product Description home alarm,home alarm system,home security system,alarm system,alarm, gsm alarm,home security, wireless alarm,accessory,alarmFeatures:1. Protection different ... be recovered. When received alarm message, it speaks as you spoken. 6. NI-MH rechargeable battery to back ... power is off. 7. Telephone manages the alarm system, convenience.8. Phone trunks protected to avoid any ...