Caliation function.Chronograph with 100 laps memory record.4 training modes: target distance-2 for user's preset distances, half marathon, full marathon.Time/date daily alarm.4 training modes: 2 for user's preset distances, half marathon & full marathon modes.Current, average, maximum & minimum heart rate.Current, average & maximum speed This heart rate monitor and watch is the perfect addition to your training program! now you can monitor your heart rate as you run, jog, or doing any cardiovascular exercise. your heart is a muscle and can be made stronger through exercise-and when training, it’s important to have an idea of your ideal heart rate zone. this watch also includes a chronograph, daily alarm, heart rate statistics (current, average, minimum, and maximum heart rates)-plus a wealth of other features including marathon training mode. you can hook it up to your pc to download your data and analyze it over time. it’s also equipped with a pedometer to count your steps and calorie and fat burned counters. led backlight makes reading the watch easy at night.