Headphone adapter set: 6.35 mm (1/ 4 inch) audio stereo plug to 3.5 mm (1/ 8 inch) stereo headphone jack adapter. Wide application: earphone adapter can be applied to mixers and music applications, fit for use with guitar amps, stereo system, headphones, etc. Handy connection: headphone jack enables you to connect your headphones or stereo other compatible devices with most pro audio and home audio equipment Durable and transfer good signal: nickel plated connectors of the headphone jack plug resist corrosion and ensure minimal signal loss, for a long time use Easy to use: 360 degree grip tread of the stereo audio adapters allow you to plug and unplug easily and conveniently.