QUADLOCK-UNI.SS is a universal adapter used to integrate after market audio and video systems into a car stereo. It facilitates the connection between audio/video components, such as amplifiers, equalizers, box woofers, and head units, to the car stereo. This adapter provides a 4-channel output and accepts a stereo input. The adapter comes in a stainless steel housing and ensures that the connections between components are secure and stable. It also ensures that noise is not created when connecting multiple components. QUADLOCK-UNI.SS is 100% plug and play, making it easy to install and operate.