LED Light, Daily alarm, Hourly time signal 1/100 second stopwatch, Measuring capacity: 59'59.99", Measuring modes: Elapsed time, split time 1st-2nd place times, Auto-calendar set at 28 days for February, 12/24 hour formats Accuracy: +/-30 seconds per month, Battery: CR2016, Approx. battery life: 7 years 100M Water Resistant #1,736 in Clothing, Shoes & Jewelry ( ) #6 in