Item Type: Music Spectrum Level Light Material: Acrylic Equalizer Display Area: Approx. 250 x 52mm / 9.8 x 2.0in Power Voltage: DC5V, 7-18V Maximum Current: 0.5A Frequency Response: 20Hz-20KHz Channel: Dual Channel EQ: 15 Band 30dB Equalizer Battery Specification: 1 x CR1220 (Not Included) 1Professional Grade Control: Dual channel synchronized control of a 15 band digital equalizer with LED spectrum indication for each band and real time 15 band frequency with 99 percent accuracy. 2Signal Equalization: An equalizer is a sound processor used to achieve a balanced and equalizing effect on sound signals. Precise sound production using intuitive controls through noise gate noise reduction. 3Adjusting Spectrum Balance: Adjusts the volume of different frequency ranges of an sound signal to make bass, midrange and treble more balanced across the frequency spectrum. Improves the clarity and timbre of the sound by enhancing or weakening the volume of specific frequency ranges. 4Eliminate Feedback Problems: In live sound applications, equalizer can be used to eliminate feedback problems in an sound system. By attenuating the volume of a feedback frequency range, feedback sounds can be reduced or eliminated, improving the stability of the sound system. 5Adjusting Sound Effects: Music spectrum level light can be used to adjust special effects in sound, such as increasing bass effects and emphasizing vocals. By adjusting the volume of different frequency ranges, various sound effects can be customized and adjusted.1 x MusicSpectrumLevelLight1 x USB Cable 1 x User Manual 1 x Sound Cable 1 x Connection Cable Manual measurement, please allow some errors.