It will work even when the socket is hidden behind furniture or in an adjacent room.Note:a) We suggest the user does not place sockets close to each other (e.g. in a twin wall outlet, or in an extension lead); b) Do not plug in anything above 13A (3210W); c) Do not plug in near to fans or other appliances which emit RF disturbance as this can affect signalling between the controller and socket. d)