This is a 4-input and 8-output Car amplifier, 4 high-level inputs or 8 high-level outputs, 2 low-level inputs or 8 low-level outputs, and 8 adjustments. Support 31-band EQ adjustment for mobile phones and computers. Support U disk or Bluetooth 5.2 or AUX input or optical input. Note: Only bare machine, without wiring harness and display. Parameters: Channels: 8 EQ: 31-band EQ Amplifier type: Class AB Power: 8X90W Impedance: 2-4 Signal-to-noise ratio: 108db Working voltage: 10V-15V Frequency response range: 20hz-20khz High level: 4-input and 8-output Low level: 2-input and 8-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 x 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.