Casio Men's 'Edifice' Quartz Stainless Steel Casual Watch, Color:Two Tone (Model: EFR547SG-7A9V) 100m water resistant, 1/10 second chronograph, date display, spherical mineral glass, super illuminator Screw-lock case back, battery: sr920sw, approx. Battery life: 2 years, module: 5372 Quartz Movement Case Diameter: 47.43mm Water resistant to 100m (330ft): in general, suitable for swimming and snorkeling, but not diving