RadioShack # 270-054A. Eliminate the electrical noise and hum caused by ground loops. Installs in-line, between the head unit and equalizer or amplifier input. RCA plugs on input and output. Includ...
3.5mm mono phone plug on flexible 3 ft shielded cable. Plug tip is connected to shield. Center conductor not connected (see Customer Comments). Unidentified bead-device (antenna?) on other end.