Casio Men's 'Pro Trek' Quartz Stainless Steel and Titanium Sport Watch, Color:Black (Model: PRW-6000SYT-1CR) Multi-Band Atomic Timekeeping ,Tough Solar Power, Smart Access, Tough Movement, Auto hand home position correction,100M WR,Low Temperature Resistant,Altimeter,Digital, Compass,Barometer,Thermometer World Time,5 Daily Alarms, Hourly Time Signal, Countdown Timer,12/24 Hour Formats, Solar Rechargeable Battery, Saving Function,Battery Life: 6 months on full charge (w/o further exposure to light) Quartz Movement. This watch has a negative display(the background is dark and the digits are light). Case Diameter: 52.1mm Water resistant to 100m (330ft): in general, suitable for swimming and snorkeling, but not diving