General Remote Bass Controller for Auto Sound Simple Connection Amplifier Volumes Adjust Knob set with Long Cable Features_x000D_ _x000D_ Suitable for 4pin line,12v power amplifier equipment._x000D_ Enhances your Auto Sound experience with this Bass Knob, General car amplifier Volumes control designed for precise bass and Volumes adjustments._x000D_ This knob features simple in/out connections for easy installation, allowing you to adjust Gains and frequency without the need for additional wiringperfect for audiophiles seeking best sound quality._x000D_ Suitable for music enthusiasts and professional sound producers who demand convenient control over their car's Sound while on the move._x000D_ Whether cruising on a long road trip or enjoying your favorite tracks during daily commutes, this bass knob ensures your Sound is tailored to your preferences._x000D_ This Bass Knob not only complements modern auto interiors with its design but also offer a and responsive interface for fast Sound adjustments, making it essential accessory for any Auto Sound upgrades._x000D_ Specifications:_x000D_ _x000D_ Material: plastic _x000D_ Head size: about 6x4cm/2.4x1.6inch_x000D_ Cable length: 5m_x000D_ Note:_x000D_ _x000D_ Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid,_x000D_ Due to the difference between different monitors, the picture may not reflect the actual color of the item._x000D_ Package Includes:_x000D_ _x000D_ 1xCar Amplifier Gains Adjuster _x000D_