Stereo Headset Adapter 3.5mm for Sony Ericsson K750c K750i K758c K790a K800i W810 M600i M608c P990c P990i V630i W300c W300i W550c 550i W600c W600i W700c W700i W710c W710i W800 W800c W800i W810c W810i W850i W900c W900i W950c W950 Z520a Z520c Z520i Z525 Z525a Z525i Z530c Z530i Z550c Z550i Z710c Z710i K550i W880i Z610i Z750i W580i J220a J220i J230i K310a K310c K310i K510a K510c K510i K610i Brand new non-OEM Convert headset adapter to 3.5mm. Adjust the audio directly from the cellular phone.