1、Professional 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. 2、Signal 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. 3、Adjusting 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. 4、Eliminate 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. 5、Adjusting 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 Music Spectrum Level Light1 x USB Cable1 x User Manual1 x Sound Cable1 x Connection Cable   Item Type: Music Spectrum Level LightMaterial: AcrylicEqualizer Display Area: Approx. 250 x 52mm / 9.8 x 2.0inPower Voltage: DC5V, 7-18VMaximum Current: 0.5AFrequency Response: 20Hz-20KHzChannel: Dual ChannelEQ: 15 Band ±30dBEqualizer Battery Specification: 1 x CR1220 (Not Included)