Specifications: Resin Glass 100-meter water resistance Case / bezel material: Resin Resin Band LED backlight (Super Illuminator) Afterglow Dual time 1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) Daily alarm, selectable flash alert/vibration alert Hourly time signal Vibration alarm Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, pm, month, date, day Accuracy: +-30 seconds per month Approx. battery life: 10 years on CR2032 Size of case: 51.4 X 47.1 X 16.1 mm Total weight: 50 g LED:White