Resin Glass 50-meter water resistance Case / bezel material: Resin Resin Band LED backlight Afterglow 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 Auto-calendar (to year 2099) 12/24-hour format Regular timekeeping: Hour, minutes, seconds, pm, month, date, day Accuracy: ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????20 seconds per month Approx. battery life: 10 years on CR2016 Size of case:?46.5??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????a?????????????????????????????40.9??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????a?????????????????????????????11.8?mm Total weight: 33 g LED:Amber