KOSS EQ50 Portable Stereo Equalizer

The pocket-size Koss EQ50 Equalizer allows adjustment of low, midrange and high frequencies when used with a Personal or portable Audio player. You have the ability to customize the Sound to meet your distinctive tastes for enhanced listening pleasure. Connects between your portable-stereo and your Headphones Mini-output goes into your portables headphone jack Your headphones connect to the EQ50 Three-band stereo equalizer for expanded Frequency response and acoustical contouring Ideal for portable audio use including PC laptops, MP3, DAT and CD players Pocket size for easy travel and portability Level controls for bass, midrange and Treble provide added sound definition where you'd like to hear it Unity gain amplifier limits power from the source Operates on (2) "AAA" Batteries (not included) for about 15 to 20 hours of use