Specifications Case / bezel material: Resin Resin Band Resin Glass 50-meter water resistance LED Backlight Afterglow Resin Glass / Spherical Glass Dual time 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Daily alarm Hourly time signal LED backlight Afterglow Auto-calendar (to year 2099) Accuracy: ±20 seconds per month 12/24-hour format Regular timekeeping: Hour, minute, second, pm, month, date, day Approx. battery life: 10 years on CR1620