Casio Edifice Chrono EF-527D-1AVEF Mens Chronograph very sporty Imported 100M Water Resistant,Battery: SR927W, Approx. battery life: 2 years 1/20 second chronograph Measuring capacity: 11:5959.95 Measuring mode: Elapsed time Slide rule function, Date Display, Mineral Glass Screw Lock Crown, Screw Lock Back, Solid Stainless Steel Band Double-lock, 1-press, 3-fold buckle, Accuracy: +/-20 seconds per month (with no signal calibration)