|1/100-second stopwatch. Measuring unit: 1/100 second (for the first 60 minutes) 1second (after 60 minutes). 12/24-hour format. Approx. 2 years on CR2016. Countdown timer. Measuring unit: 1/10 second. Electro-luminescent back light. Hourly time signal. Regular timekeeping. Shock resistant (G-SHOCK). 53.2 X 50.0 X 16.3 mm / 67 g. Measuring capacity: 23:59' 59.99". Measuring modes: Elapsed time, split time, 1st-2nd place times. Accuracy: ±5 seconds per month. battery life. Auto-calendar (to year 2039). 3 independent countdown timers. Input range: 1 to 60 minutes(1-minute increments). Afterglow. Multi-function alarm. Hour, minutes, seconds, am/pm, month, date, day.