ZonePad 4 enables the selection and volume control of all audio sources connected to your Zone 4, 4P, Zone 8 or 8P, and also allows you to select any one of four zones. If you are using Zone 4 or 4P, it essentially duplicates the front panel. In the case of Zone 8 or 8P it will control the first or second group of four zones according to how it is connected to Zone 8 - see Connecting ZonePad 4.
The ZonePad 4 can also select a locally connected microphone or Lin source in a Zone, when used in conjunction with a a ZonePad 1 providing local inputs to that Zone. The local input in a Zone is selected with the 'Local Source' button, the input type can be selected using the 'MIC, MUSIC' button in the centre disc.
ZonePad 4 is connected to Zone by CAT 5 cable and RJ45 connectors, and fits into a standard UK sized wall box cutout.