... show on the alarm panel. 2. Preset 6 phone numbers which can be dial automatically to ... an alarm 5. Back up power supply use to the AC power failure6. With keyboard preset all ... With DC /AC available, emergency rechargeable battery and power supply build-in, both of that are automatically ... Wireless receiving distance: 100m 6) Alarm volume: 110dBwidely using in home ,office ,power system ,ect place for ...