Stopwatch 1/100-second stopwatch Measuring capacity: 59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times Alarm/hourly time signal Daily alarm Hourly time signal Light Electro-luminescent backlight Light color EL:Blue Calendar Auto-calendar (28 days for February) Accuracy Accuracy: ±30 seconds per month Other features 12/24-hour format Regular timekeeping: Digital: Hour, minute, second, pm, date, day Resin Glass Case / bezel material: Resin / Chrome plated Resin Band Water Resistant Power supply and battery life Approx. battery life: 7 years on CR2016