Track heart rate continuously on your wrist to maximize workouts, better track calorie burn, and get a clearer picture of your health - all without an uncomfortable chest strap. Track steps, distance, calories burned, floors climbed, active minutes and hourly activity with long-lasting battery life. To help you stay active throughout the day, charge 2 sends reminders to move that encourage you to take 250 steps every hour. Charge 2 automatically tracks how long and how well you sleep to help you work toward a better routine.