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″”
Syncing requires Bluetooth LE and Internet connection. Windows 10 computers that do not have Bluetooth LE will need a wireless sync dongle in order to sync.