Universal RCA Level Controller Car Amplifier RCA Adjuster Tuner Controller Features: OOTDTY 2 kinds of Volumes adjustment. is to increase the adjustment to make the song sound louder, and the other is to reduce the Volumes. Very comfortable and easy to adjust. Good material The controller is made from and plastic. The has good electrical conductivity for optimal transmission. The controller is easy to install without wiring. Simple installation, can be directly adjusted when installed. More convenient to adjust the Volumes of the Volumes. Specifications: Material:ABS Connector:4Pin Cable Length:Approx.4Meters/13.1Ft Package Includes: 1x Amplifier Bass Knob Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. _x000D_ _x000D_ _x000D_