Jabra Sport Pace Wireless Bluetooth Earbuds - U.S. Retail Packaging Bluetooth Version: 4.1Talk range: up to 10 m (33 ft) Secure and comfortable fit with behind the ear wearing style and multiple sized ear gels 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 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.