Fitbit Charge 4 Advanced Fitness Tracker with GPS, Swim Tracking & Up To 7 Day Battery, Black
Battery Life: Up to 7 days
Compatibility: Compatible with iOS 12.2 or higher & Android OS 7.0 or higher
Built-in GPS: With built-in GPS, leave your phone behind and explore the outdoors with pace and distance on your tracker and see a workout intensity map showing your route and effort in the app when you’re done
Active Zone Minutes: This feature alerts you to which heart rate zone you’re in so you can see if you’re working hard enough to reach your goals
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