Features: * Built-in high-performance Microphone and Speaker, offering you perfect sound and clear communication effect. * With built-in microphone, it sets your hands free from answering calls while driving or doing other things. * Easy to control playing / pausing music, next / previous track, answering / ending an incoming call with one button. * Light-weight in-ear headphones and perfect-fit plug angle ensure a long time comfortable wearing. * High-quality 3.5mm plug is compatible with smart phone, MP3, MP4, PC and many other 3.5mm audio devices.