1/100 Second Chronograph measures up to 24 Hours Split Second Accuracy Sound Signal when Time is up 60 Minute Countdown Timer Daily Alarm Dual Time Digital Month, Day, and Date One-Way Rotating Bezel Electro-Luminescent Backlight Stainless Steel Case and Bracelet with both Brushed and Polished Accents Mineral Glass Crystal Fold Over Safety Clasp with Push Button Water Resistant to 100 Meters Quartz Movement, Battery #SR927W 40mm Case Width not including crowns (about 1 5/8 inches)