... to make sure whether it is a real alarm or just simply a false alarm, when not working with Center ... zone 3 with delay timer, zone 4 without delay, or zone 2 is 24 hours zone, while zone 3 ... disarmed)14). Unique watchdog function, monitor the old, patient or important place. When one zone is set to be ... 16). Remote control, listen in, speak, arm, disarm, or turn on/off the siren from a remote phone