Resin Glass Water Resistant Case / bezel material: Resin / Chrome plated Stainless Steel Band Adjustable Buckle LED light 1/100-second stopwatch Measuring capacity: 59'59.99" Measuring modes: Net time, split time, 1st-2nd place times Daily alarm Hourly time signal Auto-calendar (28 days for February) 12/24-hour format Regular time keeping: Hour, minute, second, pm, date, day Accuracy: ±30 seconds per month Approx. battery life: 7 years on CR2016 and total weight: 48 g.