Fangrui Product Details 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 Hz Control. Specifications: Power Supply: Dc12v Maximum Output Voltage: 8v Rms Leveling Range: 12db Subwoofer Frequency: 30hz-120hz Upgrade: 1. Karaoke Function With Microphone 2. External Sound Input Sensitivity Adjustment Material: Metal Colour: 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 Pictu