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The toy-cassette recorder "Wave" from the 1st quarter of 1989 was produced by the Saratov Production Association "Case". '' Wave '' is a modernized version of the model '' Wave '' produced since 1985. On email schemes, sometimes it is referred to as `` Wave-M '', although the schemes of both models are the same. The new model is designed to play through the built-in speaker system of phonograms recorded at a speed of 4.76 cm / s on magnetic tape placed in the MK cassette in order to organize various games, develop musical abilities, as well as skills in handling complex technical products in children from 8 years old and older. The supply voltage from the batteries is 6.3 ... 9 V. From an external DC source with a rated load current of at least 0.3 A - 6.3 ... 10 V. The speed of the magnetic tape 4.76 ± 3% cm / sec The working frequency range on the linear output is 100 ... 10000 Hz, on the loudspeaker 200 ... 7000 Hz. The rated output power is 0.5 watts. The battery life of the toy recorder is at least 10 hours. Dimensions of the toy 222x205x75 mm. Its mass with batteries and a cartridge of 2.2 kg.