HR and 24/7 heart rate, calorie tracking & encouraging reminders to help you reach your goals. PRODUCT FEATURES Track all-day activity: your hard-earned steps, distance, hourly activity, active minutes and calories burned 24/7 heart rate more precisely tracks calorie burn, resting heart rate & heart rate zones Automatically and conveniently record workouts like walks, swimming & bike rides in a snap with SmartTrack Swimproof, so you can feel inspired from the shower to the pool The on-screen dashboard, intuitive touchscreen and backlit display make Inspire HR easy to use and love Automatically track sleep, plus get more insights into your light, deep & REM sleep stages. Activate 15+ exercise modes with goals like distance, calories burned, and time spent exercising. Connect Inspire HR to your phone’s GPS & see real-time pace and distance on your wrist. Stay motivated by connecting with friends, competing in challenges, earning badges and celebrating goal milestones. WHAT'S INCLUDED Fitbit Inspire HR activity tracker Two wristbands (small & large) Charging cable PRODUCT DETAILS 0.50"H x 0.64"W x9.7"D Weight: 0.04 lbs. Small band: fits wrists from 5.5'' to 7.1'' in circumference Large band: fits wrists from 7.1'' to 8.7" circumference Rechargeable Lithium ion Battery life up to 5 days (varies with use and other factors) Battery charge time: 2 hrs. Water resistant to 50 meters Compatible with IOS and Android Manufacturer's 1-year limited warranty. For warranty information please click here Model no. FB413BK