Featuresr superior audio qualityr with a built in microphone iphone users can use it to make phone callsr compatible with all portable music players cellphones mp3 mp4 mp5 and tablet pc that have a 35mm earphone jack socketr balanced voice performance and comfortable wearing experiencer simple button design offers users conveniencer stylish and elegant appearancer r noticer the microphone of the earphone is supported only by ipod nano 4th generation and later ipod classic 120g