Eforcity 3.5mm Stereo Headset Speaker Adaptor for Sony Ericsson Adapter converts the phone's own audio output into universal 3.5mm output 3.5mm output means unlimited possibilities of device to broadcast the audio sound/music from your phone Adapter allows connection to any 3.5mm stereo headset and portable speaker Adapter also allows your phone/PDA to connect to any home stereo system [Note: May require additional RCA Y-Cable] Compatible with:D750 / D750i / K750 / K750c / K750i / W700 / W700c / W700i / W800 / W800c / W800i/J100 / J100a / J100i/J220 / J220a / J220i/J230 / J230i/K200a/K310 / K310a / K310c / K310i/K320i/K510 / K510a / K510c / K510i/K550 / K550c / K550i / K550im/K610 / K610c / K610i / K610im / K618 / K618i / K750 / K750c / K750i / K758c / K790 / K790a / K790c / K790i / K800 / K800c / K800i / K810i / K818c / P990c / P990i