An installation unit for a bathroom, having at least one wall cladding element covering a bathroom wall. At least one transmitter unit having at least one associated transmitter antenna, which is part of a wireless power and/or signal transmission device, is disposed on the rear side, facing away from the visible side, of the wall cladding element. The transmitter unit can be coupled in a wireless power and/or signal transmitting connection to a receiver unit positioned in the bathroom.