The Strap-free Heart Rate Monitor offers all the heart rate data you need without the restrictions of a chest belt. Strap on the shock-resistant wrist unit and simply place your fingers onto the conductive plates. In just seconds, your current heart rate is clearly displayed on the large LCD screen. A built-in stopwatch and calorie counter also help monitor your workout progress and work toward your fitness goals. The watch also has 12/24-hour clock with alarm function and calendar. Water resistant up to 165 feet. One CR2032 battery included.