In Wall Audio Control UnitThe Audio Control Unit is a standalone solution that allows you to send the audio signal from one area to another, such as from a television in one room and extend it to a different area. The Unit has an ON OFF button and a volume control UP DOWN. It is also the perfect fit for the In Wall Bluetooth Audio Receiver when you wish to extend the Bluetooth signal to another area, such as a bedroom bathroom combination. Features: Fits into standard Decora