Fits most wrist sizesMeasures steps taken, calories burned, time of activity, quality of sleepGPS and GLONASS receiverElevate™ wrist-based heart rateUp to 2 weeks of battery lifeDisplays email, text and other alertsCompatible with Android, iOS and Windows Phone

Ensure powerful performance by using this Fenix 5 sapphire watch. It monitors heart rate and location so that you can tell exactly how much exercise you've done, and it includes up to 24 hours of battery performance with the GPS on. Exceptional ruggedization combines with a sapphire lens to ensure this Fenix 5 sapphire watch resists daily abuse.