Easily fit in workouts with personalized on-screen workouts that play on your wrist and coach you through each move Take your favorite music anywhere by storing 300+ songs or downloading playlists from Pandora Access your favorite apps for sports weather & more and see notifications for calls calendar events or texts & send quick replies (coming soon to Android) Track heart rate all day during workouts & over time with a 4+ day battery life (varies with use and other factors) Use 15+ exercise modes like Run or Swim (Fitbit Versa is water-resistant to 50 meters) to record workouts and connect to smartphone GPS for real-time pace & distance on screen The minimum and maximum circumference range between 140 - 206 millimeters