Enhance your car audio experience with the universal RCA audio controller/amplifier video device. Featuring inputs and outputs, this device allows for easy volume adjustments. To use, connect the RCA inputs to your car's audio source and the RCA outputs to your amplifier. This setup provides a straightforward way to manage your audio levels, ensuring optimal sound quality and performance in your vehicle. Features -Color:Multi -Material:Copper -Size:25.00X5.50X2.30cm/9.82X2.16X0.90in -Versatile connectivity: featuring rca inputs and rca outputs, this audio amplifier allows for the connection of multiple audio sources, making it highly versatile for different setups -Volume: the volume control feature enables you to finetune the audio levels according to your liking, providing a tailored audio experience in your vehicle -Enhanced audio quality: the audio amplifier for car audio ensures that the audio output is clear and highfidelity, significantly improving the sound quality of your car's audio system -Userfriendly design: this universal bass knob for amp is designed for ease of use, allowing you to quickly and easily connect your devices and start enjoying enhanced audio -Universal application: compatible with a wide range of car audio equipment, this bass control knob is ideal for anyone looking to upgrade their car's audio performance Package list: 4 x audio adjusters