The Casio G-Shock Classic GAW-100B-1AER is a men's watch with a robust appearance. The watch case is shock resistant and water resistant up to 20 bar. With this you can swim and snorkel. In addition to the time, you also view the date and weekday on the display. In dark conditions you only have to turn your wrist, which automatically illuminates the display. The battery of the watch is powered by light energy. The watch also has a stopwatch, timer and you can set up to 5 alarms.