The E-300 heart rate monitor is a deluxe monitor with many features that allow your students to select between different activity modes and heart rate training zones. Using the activity mode they select, along with their personal physical data, their Ekho™ heart rate monitor will produce a precise reading of their heart rate and calories burned. The system monitors their body every second during their exercise session. Features five heart rate training zone programs with audio/visual alarm, 5 activity mode programs, current/average/maximum heart rate, target zone programming, out-of-zone visual display, time of day, stopwatch, chest belt transmitter, changeable batteries, large dual display and water-resistant.