Tracks speed distance and strides. Intelli-track HR Zone display. Wrist top and chest belt unit (works with or without chest belt). Continuous heart rate. On-demand heart rate. Any-touch technology. Target HR zone selector. Fat-burning zone locator. Features: Speed, distance, calories, activity timer, goal track, memory recall, zone tracker, stopwatch, countdown timer, dual time, sensitivity adjust, alarm, backlight, water resistant, shock resistant.