Bosch PLN-4S6Z industrial grade remote control and input panel for All-In-One system. Designed to take-over operational control of the All-In-One unit for control away from the rack. The Enable button toggles between main unit control or wall panel control. The wall panel is capable of selecting a music source, selecting the zones that receive the music, and can also control the master volume. It also provides an XLR mic and 3.5mm line input with level control. Connects to All-In-One unit via CAT5 cable.