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Since 1974, the portable electromegafon Vitiia has produced the Pavlovo-Posadsky plant Exciton. Electro-megaphone "Vimi" is intended to enhance speech in a radius of 8 ... 10 meters and can be used by guides, coaches, bus drivers. The megaphone consists of a microphone, a transistor amplifier with a loudspeaker and batteries, combined in a plastic case. The microphone is applied MD-64, loudspeaker 1GD-40. Amplifier and loudspeaker reproduces the frequency band of sound - 100 ... 8000 Hz. The rated output power of the amplifier is 1W. Power is supplied from two batteries KBS-L-0.7. Megaphone works well at ambient temperatures from -40 to 50 ° C. The dimensions of the electro-megaphone are 195x110x56 mm. Its mass with batteries of 1 kg. The price of an electro megaphone is 25 rubles.