Scosche Ground Loop Isolator: * Ground loop in-line noise suppressor * Eliminates whining noises caused by ground loops * Essential accessory whenever multiple components with RCA (low level) inputs are used * Stereo connectors make installation easy * Isolate multiple components to prevent ground loops * May be used as a trouble shooting installation tool to break grounds without removing grounding parts * Compact case installs neatly behind dash * Equipped with two males and female RCA jacks for interconnection with cable adapters/components * Designed to interface with line-level outputs