Fit Bit Charge 2 Activity Tracker plus heart rate

Fit Bit Charge 2 Activity Tracker - comes with four size small wrist bands - and a charger Read below on what the Fit Bit does : 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 • Automatically track how long and how well you sleep and wake with a silent vibrating alarm • Use to track specific workouts (Run, Bike, Weights and more), see real-time exercise stats like calories burned on display, and get post-workout summaries on display