The Ekhoreg E 15 heart rate monitor makes listening to your heart easy and affordable, allowing you to focus on your workouts without worrying about complicated multifunctions. Heart rate functions include current heart rate, average heart rate, max heart rate, target zone, out of zone alarm, calories burned, and ECG accuracy. Watch functions include time of day, date, stopwatch, water resistant, interfaces with heart rate interactive exercise equipment, and user changeable batteries in transmitter and watch.