The RNK-02 and RNK-04 radio key transmitters are elements used to send control signals (switch on/off, dimming/brightening, raising/lowering window blinds, time functions), directed to EXTA FREE system receivers. The transmitters have the form of a traditional installation connector. Due to their small size, light weight and elegant form, they can be placed on any surface (also glass, wood, etc.) and in any location of the room.EXF10000040