Fitbit Inspire HR is a friendly heart rate & fitness tracker for every day that helps you build healthy habits. This encouraging companion motivates you to reach your weight and fitness goals and even enjoy the journey with 24/7 heart rate, workout features, calorie burn tracking, goal celebrations, sleep stages and up to 5 days of battery life. Large fits wrist 7.1"" - 8.7"" in circumference. Small fits wrist 5.5"" - 7.1""
- 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
- 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.Charge time (0 100%): Two hours
- Automatically and conveniently record workouts like walks, swimming & bike rides in a snap with SmartTrack.Stores heart rate data at 1 second intervals during exercise tracking and at 5 second intervals all other times
- Radio transceiver: Bluetooth 4.0. Fitbit Inspire and Inspire HR are water resistant to 50 meters. We do not recommend wearing Inspire or Inspire HR in a hot tub or sauna. Operating temperature: 14 degree to 113 degree Fahrenheit. Maximum operating altitude: 28,000 feet