... system, alarm system, alarm, gsm alarm, home security, wireless alarm, accessory home alarm, home alarm system, home security system, alarm system, alarm, gsm ... been triggered ,the zone number of the sensor will be show on the alarm panel. 2. Preset 6 phone numbers ... receiving distance: 100m 6) Alarm volume: 110dBwidely using in home ,office ,power system ,ect place for the safety and burglarproof ...