An apparatus for medical diagnosis and therapy systems has at least one operator control device generating at least one control signal corresponding to at least one function of the apparatus, a control unit for converting the at least one control signal into the at least one function of the medical apparatus, a signal transmission device for wireless transmission of the at least one control signal from the at least one operator control device to the control unit of the medical apparatus, and at least one console adapted for detachably engaging the at least one control device. The signal transmission device has at least one first transmission unit in communication with the at least one operator control device and at least one second transmission unit in communication with the control unit. At least one interference-free transmission path is established when the at least one control device is engaged with the at least one console.