Musiclily 1/8 3.5mm Female to 1/4 6.35mm Male Mono Guitar Audio Headphone Jack Adapter Converter Connector((Pack of 2) Allows you to connect a 3.5mm jack to a 6.5mm (1/4") plug Mono for use with professional audio equipment. Used for microphone or headphone Mono output Package include: 2 x Audio adapters