Ruiling 2-Pack 3.5mm Male to 2.5mm Female Stereo Headset Adaptor For Apple iPhone HTC Nokia and Other Phone Models audio devices (This will allow you to use your 2.5mm headset with a device that has 3.5mm). Adaptor converts the phone's own audio output into a universal 3.5 mm output 3.5 mm output means unlimited possibilities of device to broadcast the audio sound / music from your phone Adapter allows connection to any 3.5 mm stereo headset or portable speaker, including other iPod headsets Adapter also allows your phone / PDA to connect to any home stereo system 2.5mm Female to 3.5mm Male Headset Adaptor for Apple iPad/iPad 2/iPhone/3G/ 3Gs/4/4 CDMA/HTC and Other Phone Models