1 Precise Bass Control: This universal bass controller resolves the issue of asynchronous volume levels between the car speaker main control panel and the subwoofer, providing precise bass control and adjusting low frequency output 2 Quick Installation: This bass control knob features a 6 pin plug that is compatible with most car amplifiers. Simply insert the plug into the subwoofer interface for easy setup. It also includes a power indicator to display the connection status 3 Flexible Extension Cord: The bass control knob comes with a 13ft extension cable, which is long enough to install the controller in a convenient location for the driver or anywhere you want to control the bass volume, the LED power indicator confirms the connection status 4 Long Lasting Durability: The subwoofer volume controller for car amplifiers is made of pure copper core and PVC insulation material, featuring anti aging, anti sunlight, and wear resisting properties to ensure long lasting performance 5 User Friendly Design: The volume controller is simple to install and use. It is typically installed in the driver space or other suitable locations, allowing you to remotely adjust and control the volume of the subwoofer from the front seats

What's in the box
1 x Bass Control Knob
1 x 6Pin Extension Cord