pUltimate Ears Super.fi 5vi uses the same speaker and sound signature used in our professional monitors. It offers the most detailed and sonically rich experience when listening to all type of musical genres. The top fire armature produces a detailed and full soundstage. There is an integrated voice functionality that is specifically designed for use with the iPhone and 3.5mm Blackberry. This allows for hands free phone calls. The Super.fi 5vi also features a multi-function button that answers/ends phone calls and controls music/video./p