About this item

• Utilize 24/7 heart rate to more accurately track calorie burn, resting heart rate & heart rate zones during workouts
• Track all day activity, including steps, distance, hourly activity, active minutes and calories burned. Operating temperature is -10° to 45° C
• Automatically track sleep, plus due to the heart rate feature, get more insights into your light, deep & REM sleep stages
• Enjoy up to 5 days of battery for daily progress without constant charging; varies with use and other factors. Maximum operating altitude is 8,535 m
• Automatically and conveniently, record workouts like walks, swimming & bike rides in a snap with smart track. Syncing range up to 6 meters
• Radio transceiver: Bluetooth 4.0; automatically syncs to 200+ android, iOS & windows 10 devices so you can see your progress in the app
• See your real-time pace and distance by connecting to your phone’s GPS, then get a map of your route in the Fitbit app.