this is open box Track your all-day activity, 24/7 heart rate, & sleep stages, all with a 4+ day battery life (varies with use and other factors) and a slim, comfortable design with a lightweight, anodized aluminum watch body. Syncs with Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, Android 5.0 and later and Windows 10 devices. Syncing range: Up to 6.1 m 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 more precise real-time pace & distance
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