Casio Men's DW6900CS-1 G-Shock Tough Culture Limited Edition Watch Imported Quartz movement Protective Mineral crystal protects watch from scratches Case diameter: 40.1 mm Measuring mode: Elapsed time, split time, 1st-2nd place times; Countdown timer; Measuring unit: 1 second; Multi-function alarm; Hourly time signal; Water resistant to 660 feet (200 M): suitable for recreational scuba diving