Fitbit Inspire HR Heart Rate and Fitness Tracker With S and L Bands, White, One Size, 1 Count

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° to 113° f; maximum operating altitude: 28,000 feet