Jabra Sport Pace Premium wireless sound and inline buttons to control music or phone calls Secure and comfortable fit with behind the ear wearing style and multiple sized ear gels Built toward US Military standards for rain, sweat, shock and dust resistance (IP54 rated) Rapid charge feature to provide an hour’s worth of battery life in only 15 minutes of charging. Reflective cable for early morning or nighttime usage. Integrated training via Sport Life App to provide in-ear readouts during workouts: pace, time, distance, calories burned. Also works with most popular 3rd party sports applications.