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Portable reel tape recorders "Dolphin-301" and "Dolphin-302" since 1972 produced the Simferopol plant Fiolent. Intended to record phonograms on a magnetic tape from various sources and their reproduction on their own or external speakers. '' Dolphin-301 '' is different with the power button on the microphone and it can be used as a voice recorder. The belt speed is 9.53 cm / s. Record tracks 2. The duration of continuous recording and playback is 2x45 minutes. The tape rewinding time is not more than 4 minutes. The sensitivity from a microphone is 0.3 mV, a receiver is 30 mV, a pickup is 250 mV, a radio line is 15 V. The frequency range on a loudspeaker with type 6 tape is 63 ... 10000, type 10 is 63 ... 12500 Hz. The relative noise level is -45 dB. SOI - 7%. Knock factor 0.4%. Power supply 8 elements 373 or network through a remote power supply unit at 12 V. Nominal output power 0.8 W, maximum 2 watts. The power consumption of 12 watts from the mains. Time of continuous work from fresh batteries is about 10 hours. Dimensions of the tape recorder 365x310x107 mm. Weight with batteries and coils 5 kg.