Fitbit Charge 4 Advanced Fitness Tracker with GPS, Swim Tracking
About this item
Compatibility: Compatible with iOS 13 and Android 8.0
Battery life: Up to 7 days
Integrated GPS: When you are drawn outdoors to train, your tracker shows you the pace and route even without a connected smartphone thanks to the integrated GPS. In the Fitbit app, you can view your route and heart rate zones on the training intensity map
Activity zone minutes: This feature shows you your current heart rate zone so you know if you're effectively training towards your goals
Sleep phase recording & sleep index: Batch 4 records the duration in light sleep, deep sleep and REM sleep phases. Together with the personal sleep index in the Fitbit app, you can better understand the quality of your sleep and develop a healthier sleep pattern
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