This is a genuine Sony Ericsson stereo headset that was included with Xperia smartphones around 2012. It features a microphone with a call switch. Audio output has been confirmed to work on a PC. *The microphone function has not been tested as there are no compatible smartphones available. ■Product Specifications • Name: Stereo Headset with Microphone • Brand: Sony Ericsson • Model: MH650C • Type: In-ear Wired Earphones • Connector: 3.5mm 4-pole plug (L-shaped) • Features: With microphone, call switch ■Included Items • Eartips (S, M, L sizes) - Unused • Japanese Instruction Manual *Unused / Stored at home. Thank you for viewing. #SonyEricsson #MH650C #GenuineEarphones #InEar #WiredEarphones #WithCallSwitch #XperiaAccessories #3_5mmPlug #4PolePlug #StereoHeadset #EarphonesWithMicrophone #SmartphoneAccessories