Recessed radio receivers are used both as elements for mounting in flush-mounted and surface-mounted installation boxes, as well as actuators built directly into housings of lighting fittings and other receivers. ROP-01 and ROP-02 enable operation in 5 different modes (on, off, monostable, bistable, time mode), and the RDP-01 is a radio dimmer for lighting, cooperating with traditional bulbs and lamps powered by an electronic or toroidal transformer.