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Since 1985, the Proton-402MT cassette teflotehnichesky tape recorder has been produced by the Proton Kharkov Radio Plant. "Proton-402MT" is a two-speed, four-track tape recorder designed for reproducing ordinary music and speech phonograms and phonograms of the "Talking Book" type for people with vision loss. The electrical circuit, design and design of the device, except for the track switch, the lack of a recording mode and the presence of a second speed of 2.38 cm / sec are similar to the basic Proton-402 tape recorder. Read more about the tape recorder in its instruction manual.