Fitbit Alta

Fitbit Alta - perfect condition Get the power of continuous heart rate in Fitbit's slimmest design yet-all day, during workouts and beyond With heart rate, you can better measure calorie burn, and use zones (fat burn, cardio, and peak) to find the right workout intensity for your goals With sleep stages powered by PurePulse heart rate, automatically track your time spent in light, deep and rem sleep (coming soon) and take steps toward a better night's rest See how working out more can improve your health by comparing your resting heart rate trends to your activity Battery life up to 7 days so you can track all day & night without needing a charge