Casio Men's 'PRO TREK' Quartz Resin Sport Watch, Color:Black (Model: PRW2500-1A) Imported Multi-Band Atomic Timekeeping ,Tough Solar Power,200M WR, Duplex LC Display, Tide Graph, Moon Data, Digital Compass, Altimeter Measuring, Barometer Display, Thermometer Display, Full Auto EL Backlight World Time, stopwatch, Countdown Timer, Battery level indicator, Power saving function, Full auto-calendar, 12/24 hour formats, Button operation tone on/off, Module: 3258 Quartz Movement Case Diameter: 50.63mm Water resistant 200m (660ft):in general, suitable for professional marine activity and serious surface water sports, but not diving