Case / bezel material: Resin Adjustable Clasp Stainless Steel Band Resin Glass / Spherical Glass Water Resistant Dual time 8-digit calculator 1/100-second stopwatchMeasuring capacity: 23:59'59.99''Measuring modes: Elapsed time, split time, 1st-2nd place times Daily alarm Hourly time signal Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Regular timekeeping: Hour, minute, second, am/pm, year, month, date, day Accuracy: ±15 seconds per month Approx. battery life: 5 years on CR2016