Audo Perfect Bass Earphones with Microphone 022 -Black Offers active music lovers a natural, well-defined soundstage  with an extra kick of bass Swiss-precision technology from Phonak, the world's leading hearing systems manufacturer Comfortable fit and lightweight design: perfect for travelling, working out or just relaxing Special filters punch up the bass while allowing you to enjoy music at lower and safe volumes Microphone is compatible with mobile digital devices and computers with a 3.5mm stereo jack