Gametown&reg; Gold 3.5mm Male to 2.5mm Female Stereo Audio Headphone MIC Adapter Converter Jack Type:Audio Adapter/Converter. Gold 3.5mm Male to 2.5mm Female Stereo Audio Headphone MIC Adapter Converter. Convert a 3.5mm stereo audio jack to a 2.5mm jack. This adapter allows you to use headphones and audio cables 2.5mm connectors with devices that have a 3.5mm jack. Connectors: 1 Piece of 3.5mm Male to 2.5mm Female.