Monoprice 107139 6.35mm Stereo Plug to 3.5mm Stereo Jack Adaptor, Gold Plated (2 Pack) 6.35mm (1/4 Inch) Stereo Plug (male) to 3. 5mm Stereo Jack (female) Adaptor - Gold Plated Lifetime warranty through Monoprice Gold plated for optimum signal transmission