This is a 4-input and 6-output car amplifier, 4 high-level outputs, 6 low-level outputs, and 6 adjustments. Support 31-band EQ adjustment for mobile phones and computers. Support U disk/Bluetooth 5.2/AUX input/optical input. Note: Only bare machine, without wiring harness and display. Parameters: Channels: 6 EQ: 31-band EQ Amplifier type: Class AB Power: 4X80W Impedance: 2-4 Signal-to-noise ratio: 108db Working voltage: 10V-15V Frequency response range: 20hz-20khz High level: 4-input and 4-output Low level: 2-input and 6-output Tuning: mobile phone and computer Color: Black Material: Aluminum The actual object may have color difference due to different light or display Package Contents: 1 * audio processor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.