Obtain more heart rate information for a better training session with the FiT19. Both beginners and fitness veterans will benefit from wearing this watch. Its heart rate functions include: current heart rate, average heart rate, max heart rate, target zone, out of zone alarm, time in/above/below target zone recall, calories burned and ECG accuracy. Watch functions include: time of day, date, 21 laps or file storage, stopwatch. The water resistant Fit19 interfaces with heart rate interactive exercise equipment and user changeable batteries come in both the transmitter and watch.