Make every beat count with the Special Edition Fitbit Charge 2 Heart Rate & Fitness Wristband. Get PurePulse continuous, automatic wrist-based heart rate tracking all-day, during workouts and beyond, all without an uncomfortable chest strap. Use continuous heart rate to better measure calorie burn all day and help you stay on track toward weight goals. Maximize your workouts using simplified heart rate zones (Fat Burn, Cardio, and Peak) to gauge exercise intensity and ensure you're optimizing your effort for your goals. Track resting heart rate to gauge how your cardiovascular health and fitness levels change over time.