MIO 0038USBLK Venture Strapless Heart Rate Watch ECG accurate heart rate, without a chest strap Visual indicator of exertion level based on heart rate and personal data, percent of maximum heart rate display based on age and gender Heart Rate Recovery: Measures and analyzes your cardiovascular fitness, Resting Heart Rate: Measures and displays your resting heart rate Patented calorie management system allowing users to track calories burned during exercise, can be used for MIO's 3500 Calorie Countdown Program Time & Date: Displays time, date, weekday and your name or initials, Alarm: Settable daily alarm, Backlit display