The universal RCA audio controller/amplifier video device, featuring inputs and outputs, is ideal for those who want to control their car volume with precision. To use, simply connect the RCA inputs to your audio source and the RCA outputs to your amplifier. This setup allows for easy integration into your car's existing audio system, providing you with the ability to adjust your sound levels effortlessly. Features -Color:Multi -Material:Copper -Size:25.00X5.50X2.30cm/9.82X2.16X0.90in -Comprehensive connectivity: with rca inputs and rca outputs, this universal bass knob level controller allows for the connection of multiple audio devices, providing a versatile audio setup -Audio levels: the audio volume adjust button enables you to adjust the audio levels to your liking, ensuring a tailored and enjoyable listening experience in your car -Enhanced sound quality: featuring an internal amplifier, this bass knob for car amplifier delivers clear and high fidelity audio output, enhancing the overall sound quality of your car audio system -User-friendly setup: this universal bass control knob is easy to install and use, allowing you to quickly connect your devices and start controlling and amplifying your audio -Universal compatibility: suitable for a wide range of car audio systems, this rca audio controller enhances audio performance, making it an ideal choice for any vehicle Package list: 2 x audio adjusters