... sensor, these sensors can display low voltage on the LCD and should beep8. Every zone ... . Unique watchdog function, monitor the old, patient or important place. When one zone is set to ... control, listen in, speak, arm, disarm, or turn on/off the siren from a remote phoneComponents/Feature:One ... program, very flexiable, unique watchdog, install on the wall or on the desk, all the wiring at back, ...