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Since the beginning of 1950, the collective farm radio unit KRU-2 has been producing the Kirov Petropavlovsk Plant. The radio center is designed for areas that do not have electricity and can serve up to 50 economical loudspeakers such as "SG-1." The radio center "KRU-2" can broadcast broadcasting programs through the built-in radio receiver, as well as recording through the external electric player's pickup. The rated output power of the radio node is 2 watts. The output frequency range is 100 ... 5000 Hz. Powered by batteries.