Product Description Resin body/chrome plated. Casio stainless steel bracelet Double fold clasp Digital: hour, minute, second, pm, date, day LED light gradually disappears double timing water resistant Multifunctional alarm clock with snooze alarm feature 1/100 second digital timer Measuring capacity: 23:59'59.99" Measuring modes: elapsed time, split time, 1st and 2nd position timing signal at the passage of each hour. Auto-calendar (pre-programmed to year 2099) Time format 12/24 hours Accuracy: +/- 30 seconds per month Approximate battery life: 10 years on "CR2025" Case diameter 39.5 x 32.5 x 9.8 mm Weight: 52 grams