1 A batteries required. (included)

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