200 Meter Water Resistant Electro-luminescent backlight 1/100 second stopwatch Measuring capacity: : 23:59?59.99? Measuring mode: net time, split time, 1ST-2nd place times Countdown alarm Input Range: 1 second to 24 hours Measuring unit: 1 second Auto-Repeat function, repeat function Multi-function alarm Hourly time signal Regular time timekeeping: hour, minute, second, am/pm, month, date, day Auto-calendar(pre-programmed until the year 2039) 12/24 hour formats Accuracy: +/- 30 seconds per month Battery: Approx. 2 years on CR2016