These Tough Solar models provide a choice of either the original G-5600 G-SHOCK design or the G-6900 design that is so popular among followers of today's street fashions. The Tough Solar system, which is equipped without changing the basic design of the watches, makes it possible to generate enough power to keep the watch running with minimal exposure to normal lighting. KEY FEATURES 200m water resistance Shock resistant EL backlight Tough Solar powered World Time 5 daily alarms and 1 snooze alarm Battery power indicator Power Saving 1/100 second stopwatch Full auto calendar (to year 2099)