Estone 3.5mm Male to 2.5mm Female Plug Stereo Audio Earphone Jack Adapter Converter Durable, compact, and lightweight. Easy to use, just plug and go Gold plated 3.5mm to 2.5mm stereo adapter, Gold plated Ensure the best quality of sound Converts your device's 3.5mm jack to a 2.5mm jack For simple connectivity. allows you to use your favorite 2.5mm earphone headset on some 3.5mm Mobile Phone PDA, IPAQ, MP3, MP4 player or audio / video player device