Product Description Resin Glass Water Resistant Case / bezel material: Resin Resin Band LED light 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 (28 days for February) 12/24-hour format Regular timekeeping Digital: Hour, minute, second, pm, date, day Accuracy: ±30 seconds per month Approx. battery life: 5 years on CR1616 Size of case: 34.5 X 30.4 X 8.6 mm Total weight: 16 g