About this item 4-Pack Headphone AdapterYou will get four 6.35mm (1/4 Inch) male to 3.5mm (1/8 Inch) female stereo audio adapters at a time. CompatibilityThis TRS audio adapter is a convenient and cost-effective way to connect smartphones, tablets, iPod, or headphones with standard 3.5mm (1/8 inch) plugs to audio devices with a 6.35mm (1/4 inch) stereo jack with most pro audio and home audio equipment, such as Amp Adapter, Guitar, Digital Piano, Mixing Console, Home Theater devices, or AV receivers. 3.5mm to 1/4 connectorsConnect headphones or microphones with 1/8 inch plugs to audio devices with a 1/4 inch stereo jack. Note: This converter requires the plug with TRS 3 conductors, rather than TS(2 conductors) or TRRS(4 conductors). Best Quality Material This 6.35mm (1/4 Inch) to 3.5mm (1/8 Inch) audio jack converter is made of solid brass, with a much longer service life compared with those plastic connectors with metal paint. 24K Gold-plated connectors resist corrosion and ensure reli