Fitbit Inspire HR Heart Rate and Fitness Tracker, One Size (S and L bands included), 1 Count

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. The Fitbit inspire band is made of a flexible, durable elastomer material similar to that used in many sport watches, and fastens with a peg and loop 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 percent): 2 hours Automatically and conveniently, record workouts like walks, swimming & bike rides in a snap with smart track. 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