3pk of 2.5mm Male to 3.5mm Female Audio Headphone Adapter Converter 3 Pieces of Top Quality 2.5mm Male to 3.5mm Female Audio Headphone Adapter Converter with Stereo and Mono Capabilities STEREO & MONO - It's equipped with stereo and mono system capabilities to allow conversion between 2.5 mm devices and 3.5 mm headphones. COMPATIBILITY & MORE - Compatible with any devices that has 2.5mm audio output. The set is 100% brand new and made with top quality materials. FUNCTION - An audio jack converter adapter that has a 2.5 mm male pin and a 3.5 mm female output. This serves as a converter so you can use your headphones with 3.5 mm jack to devices that has 2.5 mm audio output. CONNECTIVITY - Made with gold plated 4 pole pin connector to allow consistent signal between the device and the connected headphone. There will be no interruptions while listening to music or during phone calls.