The Casio G-Shock Master or G GGG-100-1A3ER is a shockproof men's watch that works on light energy. In addition to the time, the watch also shows the 24-hour display, the day of the week and the date. You can set up to 29 different time zones on the watch. You also use the watch as an alarm and stopwatch. Thanks to the shock-resistant design, the watch is resistant to shocks and vibrations. The LED light in the display ensures that you can easily view this data even in the dark.