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 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, Sync stats wirelessly & automatically to computers and 200+ leading iOS, Android and Windows devices
Automatically track your steps, distance, calories burned and active minutes with up to 7 days of battery life
Tap to see your stats, time & notifications on an OLED display, plus customize your clock face
Operating temperature: 14 degree to 113 degree fahrenheit Maximum operating altitude: 30,000 feet