FIELD: communication. SUBSTANCE: device housing has increment unit in order to increase size of source, transmitting unit, which has said diodes, transceiving unit, which has receiver. Receiver has four photo-sensitive diodes, which are located under mounting base, and which are diverted to different direction to receive light from all directions around assembly and are protected by thin wire grid, which serves as Faraday cage for decreasing electromagnetic interference. EFFECT: decreased size, optical beam pattern. 27 cl, 34 dwg
