... sensor, these sensors can display low voltage on the LCD and should beep8. Every zone ... 24 hours zone can not seperately disarmed)9. Unique watchdog function, monitor the old, patient or important ... listen in, speak, arm, disarm, or turn on/off the siren from a remote phoneComponents/Feature:One ... be seperately program, very flexiable, unique watchdog, install on the wall or on the desk, all the wiring ...