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The children's intercom "Friend" has been produced since 1981. Children's intercom "Friend" is intended for negotiations between subscribers at a distance of 100 meters. The kit consists of 2 devices, in one of which an audio amplifier assembled on 5 transistors is mounted. In another intercom loudspeaker and call button. Switching from reception to transmission is made by the first intercom. The power of the first intercom is carried out from the battery "Krona". Included is a two-wire cable with a length of 10 meters. Price set 10 rubles.