Features: car audio graphic equalizer with variable gain adjustment and high level speaker input, very practical in use.With 6-channel front, rear and subwoofer aux stereo output which enhances your sound experience in the car. That makes sure that your amplifier and speaker receive a powerful but clear signal.Allowed CD-and-Aux (2 channel) input with gain knob to adjust aux sound, also a CD-and-Aux input button could switch flexibly to another mode input.Flexible control as your favor, subwoofer sound control, subwoofer frequency control, fader control, each various Hz control. Specifications: Power supply: DC12VMaximum output voltage: 8V RMSLeveling range: 12dBSubwoofer frequency: 30Hz-120HzUpgrade: 1. Karaoke function with microphone2. External sound input sensitivity adjustmentMaterial: Metalcolour: Black Package Contents: 1 x Car Equalizer 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.