3.5mm Adapter for Sony Ericsson: J100a / J100i / J220a / J220i / J230i / K310a / K310c / K310i / K510a / K510c / K510i / K550i / K610i / K750c / K750i / K758c / K790a / K800i / M600i / M608c / P990c / P990i / V630i / W300c / W300i / w550 / W550c / W550i / W600 / W600c / W600i / W700c / W700i / W710c / W710i / W800 / W800c / W800i / W810 / W810c / W810i / W850i / W880i / W900c / W900i / W950c 100% new high quality generic (non-OEM) Stereo Headset / Speaker Adaptor for Sony Ericsson Z520/W550 Adapter converts the phone's own audio output into universal 3.5mm output 2.5mm also available with additional adapter piece (sent free of charger if you contact us) Adapter also connects from phone/PDA to any home stereo system [Note: May require add. RCA Y cable] Cable Length: ~2" / ~5cm / Output: 3.5mm Stereo Socket