Fitbit Charge 4 Advanced Fitness Tracker with GPS, Swim Tracking & Up To 7 Day Battery, Black

• 4 stars, based on 4 votes

• Compatibility: Compatible with iOS 15 or higher & Android OS 9.
• 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.
• SLEEP STAGES & SCORE: Charge 4 tracks your time in light, deep and REM sleep stages and gives you a nightly Sleep Score in the Fitbit app, so you can better understand your sleep quality and work toward better rest.
• NOTIFICATIONS & APPS: Stay connected with call, calendar and smartphone app alerts, text notifications and convenient apps like weather and timer.
• 24/7 HEART RATE: Use 24/7 heart rate to better track calorie burn, optimise workouts and uncover personalised health trends that inspire you to make moves on your health and fitness goals.