Homelink Black 3.5mm (1/8 Inch) Stereo Plug TRS to 6.35mm (1/4 Inch) Jack Cable Adaptor Audio Adapter 1 pcs in package, this adaptor is designed to adapt a mini stereo phone plug to a stereo phone jack Small jack plug to large jack plug converter Premium quality, no loss of sound Connector(s): 3.5 mm TRS to 1/4 in TRS It is ideal for use as a headphone adaptor