About this item Utilize 24/7 heart rate to more accurately track calorie burn, resting heart rate & heart rate zones during workouts Track all-day activity, including steps, distance, hourly activity, active minutes and calories burned Automatically track sleep, plus due to the heart rate feature, get more insights into your light, deep & REM sleep stages Enjoy up to 5 days of battery for daily progress without constant charging. Varies with use and other factors. Automatically and conveniently record workouts like walks, swimming & bike rides in a snap with SmartTrack
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