Casio Men's Illuminator Digital Watch: EL Backlight Daily Alarm 1/100 second digital stopwatch Measuring capacity: 23'59.99" Measuring modes: Net time, split time, 1st-2nd place times Hourly Time Signal Auto-calendar Accuracy: +/-30 seconds per month Day and date display Approximate battery life: 7 years Case: Molded Resin and Stainless Steel Band: Resin Clasp: Buckle Movement: Digital quartz movement Lens: Mineral crystal Dial: Blue illuminated dial Water Resistance: 100 meters (330 feet) Case Dimensions: 37.5 mm x 33.5 mm x 9.5 mm Model: F105W-1A