Product Description LED light, 1/100 second stopwatch, Measuring capacity: 59'60", Measuring modes: net time, split time, 1st and 2nd place times, Daily alarm, Hourly time signal, Auto calendar (set to 28 days for February), 12/24 hour format, Regular timekeeping: hour, minute, second, pm, date, day,,,, Accuracy: ±3 00 seconds per month, Approx. Battery life: 7 years on CR2016, Case size: 38.2 x 35.2 x 8.5 mm, Total weight: 21 g.