Wear this Fitbit Flex FB401BK wristband to monitor steps taken, distance, calories burned and active minutes, so you can easily set daily activity goals. The wristband also tracks sleep quality and length to promote overall wellness. Records steps taken, distance traveled, calories burned and minutes spent being active, so you can easily keep an eye on your daily routine. Monitors the time and quality of your sleep. A silent alarm gently wakes you in the morning. Lets you sync the device, set goals, track progress and more from your computer or mobile device (Internet connection required).