About this item: Use built-in GPS to see your pace and distance on screen during outdoor runs, walks, hikes, and more. See a workout intensity map in the app that shows your heart rate changes along your route. With Active Zone Minutes, you'll feel a buzz when you reach your target heart rate zones during exercise. Set goals, track progress, and get a complete picture of your health and fitness in the free Fitbit app. Includes Storm Blue Charge 4 Advanced Fitness Tracker, plus bonus Black classic bands. Small and Large included.