Extech 365535: Decimal StopwatchClockWater resistant decimatch stopwatchclock with user-selectable resolutionsUser-selectable resolutions of 1100 of a second, 11000 of a minute and 1100, 000 of an hourLarge triple display with adjustable contrast500 memory records of Split and Lap timesCalendar displays day, month and dateTime of day (12 or 24 hour format) with daily alarm3 Mode Countdown timer: count down stop, count down repeat, count down then count upStroke measurement