Track your all-day activity, 24/7 heart rate, & sleep stages -- all with a 4+ day battery life (varies with use and other factors)Take your favorite music phone-free by storing 300+ songs or downloading stations from Pandora or playlists from DeezerUse 15+ exercise modes like Run or Swim (Fitbit Versa is water-resistant to 50 meters) to record workouts and connect to smartphone GPS for more precise real-time pace & distanceEasily fit in workouts with personalized on-screen coaching that play on your wrist and coach you through each move. Sweatproof - Water-resistant hydrophobic nano coating is rain, splash & sweatproof. Long Battery Life - Up to 6 hours playtime, plus 15-minute quick charge for one hour playtimeAccess your favorite apps for sports, weather & more and get call, calendar, text, and app alerts. Send quick replies to messages (Android only)Special Edition smartwatch versions include a built-in NFC chip to make secure payments without your wallet and an additional black classic accessory band. One Size (S & L bands included)The minimum and maximum circumference range between 140 - 206 millimeters. Syncs with mac os x 10.6 and up, iphone 4S and later, ipad 3 gen and later, android 4.3 and later and windows 10 devices