Sing along with your favorite music. Hook-up the unit between your CD-player, MP3-player or any other line-level source and your amplifier. RCA (cinch) input and output sockets. With 1/4" microphone jack, fits most microphones. Adjustable microphone level. "Vocal reduction" switch reduces original vocals on most stereo recordings. on/off switch and LED power indicator

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Power supply: 9V battery (not incl.) Low power consumption: 16mA typ. Dimensions: 3.9" x 3.3" x 1.0".