About this item

• Utilize 24/7 heart rate to more accurately track calorie burn, resting heart rate and heart rate zones during workouts
• Track all day activity, including steps, distance, hourly activity, active minutes and calories burned
• Automatically track sleep, plus due to the heart rate feature, get more insights into your light, deep and REM sleep stages
• Enjoy up to 5 days of battery for daily progress without constant charging. Varies with use and other factors
• Automatically and conveniently record workouts like walks, swimming and bike rides in a snap with smart track
• Environmental requirements: operating temperature: 14¡Æ to 113¡Æ f; maximum operating altitude: 28,000 feet