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Since 1988, the portable cassette player "Kvazar P-405S" has produced the Leningrad PO them. M.I. Kalinina. '' Quasar P-405C '' is a wearable stereo cassette player designed to play phonograms from the MK-60, MK-90 cassettes on stereo headsets. The tape is rewound only in the direction of travel. The battery life is at least 3.5 hours. The player is powered from four A-316 elements or from an external source with a voltage of 4 ... 6 V. The belt pulling speed is 4.76 cm / s. Knock factor 0.45%. The frequency range is 63 ... 12500 Hz. The harmonic coefficient of 2.5%. Rated output power 5x2 mW. Current consumption up to 150 mA. Dimensions player 144h94h37 mm. Weight not more than 300 grams.