Casio G-Shock Mens Atomic Time Keeping Watch GW7900B-1. With the never ending pursuit of toughness and technology, G-Shock introduces a Solar Atomic addition to the tough and rugged G-Rescue series. Already iconic for its four point protection design,large case, over sized buttons, tide and moon graphs, this model keeps the same design philosophy of allowing for high functionality and operability, in the harshest conditions, even while wearing gloves. This watch is both tough and stylish. Other Features include 12/24 hour format, 4 different alarms, 200M water resistance, world time with 26 different time zones, pre programmed calendar, and much more.