Features 1.Purpose: An equalizer is an sound processing device or software used to adjust the volume levels of sound signals in different frequency ranges, thereby changing the frequency spectrum characteristics of sound. 2.Treble Middle Bass Adjustment: An equalizer allows you to adjust the volume of the bass, middle, and treble frequency ranges in your music to change the timbre and sound quality of the music. 3.EQ Adjustment: By adjusting the EQ, you can enhance or attenuate the sound of specific frequencies to make the music sound clearer, more balanced, or adapted to different listening environments. 4.Inputs and Outputs, Digital Display: The inputs are RCA (2 sound sources), USB input with control, MP3; the outputs are RCA. the digital display shows the track number and elapsed time on the USB input. 5.Direct Equalizer Function: With direct equalizer function, the equalization point is 20Hz 40Hz 90Hz 150Hz 220Hz 320Hz 450Hz 600Hz 800Hz 1.2kHz 2kHz 3kHz 4.5kHz 6kHz 8kHz 10kHz 12kHz 14kHz 17khz 20khz. specificationItem Type: 20 Band Equalizer Material: Aluminum Alloy CN Plug Voltage: 220V Power: 8W SNR>80dB Frequency Range: 20Hz-20KHz Support: Bluetooth, USB PackageList 1 x Equalizer 1 x Instruction Manual