This is the watch that monitors activity levels and quality of sleep and displays the results for easy reference. The watch tracks steps taken, calories burned, and distance traveled throughout the day, or you can turn on the exercise mode that tracks those activity variables while you workout. Its accelerometers measure movement while you sleep and an algorithm determines the amount of time spent in light, deep, and restless sleep. All of your data is uploaded wirelessly to a smartphone running a free app and you can also view activity and sleep metrics on the watch’s OLED screen. With a durable rubber band and hard plastic case. Water resistant up to 90'.