Devices such a printer 4, television 3 and car door lock 2 are controlled wirelessly by a controller 5 which may consist of eye tracking glasses that detect the gaze angle of the user also include an orientation detector that receives rf packets from the devices, from which the orientation of the device can be detected. Control of the devices is performed wirelessly when the detected orientation of the device and the gaze detection angle adopt a predetermined relationship, for example when they become aligned.