It is very simple to use. When a visitor presses the single button on the door station, the master station receives a short tone. You can then speak to the person at the door by pressing the Talk button on the master station. The person at the door station speaks hands free. If you have an optional electronic door release lock installed, you can also press a door release button (key symbol) on the master to unlock the door remotely.

The master station also has an OFF button to put the unit into standby mode to wait for the next call. This must be pressed at the end of each call or you will be continuously monitor what's happening around the front door. You can also just press the Talk button to monitor what's happening at the front door without someone having to press the button on the door station.

The voice volume on the master is adjustable by a control on the front of the master station. There is also a call tone volume control hidden beneath an operator plate.

The master station can either be surface wall mounted, or desk mounted. It wall mounts on a single-gang box or ring. The weather resistant door station surface mounts on a standard single-gang box or ring (or it could be mounted directly to the surface).

This is a kit that set includes a desk or wall mount master station, a surface mount door station, and an AC transformer to power the system. This intercom requires 2 conductor shielded cable between the door intercom and monitor.