Case / bezel material: ResinResin BandResin Glass / Spherical Glass50-meter water resistanceEL backlight AfterglowDual time1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place timesDaily alarmHourly time signalFull auto-calendar (to year 2099)12/24-hour formatRegular timekeeping: Hour, minute, second, pm, month, date, dayAccuracy: ±20 seconds per monthApprox. battery life: 3 years on CR1216