The universal RCA audio controller/amplifier video device is designed for car audio systems, offering inputs and outputs for convenient volume control. To install, connect the RCA inputs to your audio source and the RCA outputs to your amplifier. This device integrates seamlessly with your car's audio system, allowing you to fine-tune your sound levels for an enhanced listening experience. Features -Color:Multi -Material:Copper -Size:25.00X5.50X2.30cm/9.82X2.16X0.90in -Multiple audio connections: this universal bass control knob supports rca inputs and rca outputs, allowing you to connect and manage multiple audio devices effortlessly -Adjustable volume control: the integrated volume control knob lets you adjust the audio levels to your desired setting, ensuring an enjoyable listening experience -Sound output: with an internal amplifier, this bass knob for car amplifier provides clear and high fidelity audio output, enhancing the overall sound quality of your car audio system -Simple installation: easy to set up, this universal bass knob requires minimal effort to connect your devices and start controlling and amplifying your audio -Broad compatibility: suitable for various car audio systems, this rca audio controller enhances audio performance, making it an ideal addition to any vehicle Package list: 4 x audio adjusters