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