Case / bezel material: resin resin band resin glass 50-meter water resistance led backlight 1/100-second stopwatch, measuring capacity: 59''59.99'''' measuring modes: elapsed time, split time, 1st-2nd place times daily alarm hourly time signal auto-calendar (set at 28 days for february) 12/24-hour format regular timekeeping: hour, minute, second, pm, date, day accuracy:±30 seconds per month approx. Battery life: 7 years on cr2016.