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The souvenir radio "Ryazan-900" was produced in 1993 by the Ryazan Radio Factory. The radio operates in the VHF-FM range of 65.8 ... 74 MHz. Sensitivity not less than 10 mV. Antenna serves as headphone wires. Nominal output power 10 mW. The output frequency range for phones 63 ... 14000 Hz. Power is supplied from three AA elements, with a total voltage of 4.5 V. The current required does not exceed 5 mA. The issue is dedicated to the 900th anniversary of the city of Ryazan.