Microsoft Band helps you live healthier by tracking your heart rate, calorie burn, & sleep quality.The Band helps you to be productive with email, text, and calendar alerts. Track your heart rate & daily activities, like exercise, steps, calories burned, & sleep quality, while the notifications you care about most are available at a glance. Learn more about your overall fitness when you can track your heart rate at rest & at play, from day to night. Understand how your sleep affects your health. Find out how restorative your sleep is each night. Reach your fitness goals with tailored tracking whether running, biking, golfing, or working out. Preview emails & text messages, & get calendar notifications right on your wrist.