4 Health Fitness Tracker Charge Working handinhand with your fitness tracking is the builtin 247 heart rate monitor which can track calorie burn and let you know when youre in personalized heart rate zones Based on your age and resting heart rate it can tell you when youre in the fat burning cardio or peak heart rate zones Even when youre asleep the Fitbit Charge 4 is working It can track your time in light deep and REM stages to provide you with a nightly sleep score Outside of optimizing health and fitness the Charge 4 has practical advantages throughout the day such as delivering smartphone alerts and notifications playing music via Spotify or paying for items with Fitbit Pay Features. Up to 7 Days Battery Life. BuiltIn GPS Navigation Tracking. 247 Heart Rate Tracking. 20 GoalBased Exercise ModesTracking. Swimproof up to 164. Light Deep REM Sleep Tracking. Control Your Smartphone Spotify App. Receive Smartphone Notifications. Backlit Grayscale OLED Touchscreen. Track Progress Connect with AppsSpecifications. Color Black
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Up to 7 Days Battery Life
Built-In GPS Navigation & Tracking
24/7 Heart Rate Tracking
20+ Goal-Based Exercise Modes/Tracking
Swimproof up to 164″
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