DESC: Calculates your pulse rate in Beats per Minute. High and Low pulse rate target settings with alert to indicate if your rate is above or below your target zone. Full Function Stopwatch with Split timing and 1/100 second resolution. Multiple mode Countdown shows time remaining, Stop, Repeat or Count-up modes. Time of Day, Daily Alarm, Calendar, EL backlight for low light or Nightime use, Water-Resistant