HDE 3.5mm Stereo Jack to 1/4" Quarter Inch Plug Adapter Audio Converter Allows you to connect 3.5mm jack to 1/4 inch stereo plug For use with Headphones or auxiliary cables Provides better sound quality for listening to music Package Contents: 1/4 inch Male to 3.5mm Female Adapter. Length: 2.25 inches Can plug headphones into an amplifier with this adapter