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Since 1972, the network transistor "Rondo-201" has produced the Kazan Electrotechnical Plant. '' Rondo-201 '' is made on the basis of the 'Accord' 'electrophone, but it has a different exterior design and a built-in speaker system. Structurally, the microphone consists of a low frequency amplifier and a three-speed electro-playing device II-EPU-50. Nominal output power of the amplifier 2 watts. The band of reproducible sound frequencies is 100 ... 10000 Hz. The speaker system consists of a 2GD-22 loudspeaker. Power consumption 30 watts. The dimensions of the microphone are 410x320x185 mm, the mass without packaging is 8.5 kg During the release, various changes were made to the electrical circuit and the design of the microphone.