Casio Men's AQ150W-1EV "Ana-Digi Chronograph" Sport Watch with Black Resin Band Imported Quartz movement Protective mineral crystal protects watch from scratches Case diameter: 40 mm Resin case; black dial; day-date-and-month functions; chronograph functions Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving