Let your heart be your guide with Charge HR. Monitor heart rate automatically and continuously right on your wrist to accurately track calorie burn, maintain workout intensity, maximize training and optimize health — all without an uncomfortable chest strap. Take control of your goals by using Charge HR to record your workouts and track all-day activity like heart rate, steps, distance, calories burned, stairs climbed and active minutes. With an impressive battery life up to five days and instant access to every stat, you don’t have to look far for motivation to keep moving. Â With a comfortable fit and Caller ID, Charge HR lets you stay connected in style. See incoming call notifications on display when your phone is nearby to stay in the know, on the go. Use Exercise Mode to easily record workouts, see real-time exercise stats and have summaries automatically appear on your Fitbit dashboard. Use MobileRun in the Fitbit app to see pace, distance, splits and routes.