Case / bezel material: Resin Adjustable Clasp Stainless Steel Band Mineral Glass Gold ion plated band Gold ion plated case Water Resistant LED backlight 1/100-second stopwatch Measuring capacity: 59'59.99'' Measuring modes: Split time, 1st-2nd place times Daily alarm Hourly time signal Auto-calendar (set at 28 days for February) 12/24-hour format Regular time keeping: Hour, minute, second, pm, date, day Accuracy: ?ñ30 seconds per month Approx. battery life: 3 years on CR1616