Casio G-Shock G-7700-1ER A Casio G-Shock watch is built to last in whatever conditions you throw at it. Whether your sport is hiking, swimming, jogging, an extreme sport, or you just need a watch that will take some abuse; a G-Shock watch is an excellent choice. On top of all the features that you normally associate with the 'G-Shock' range like shock resistance & water resistance, this watch also comes with a flash alert, World Time, 2 Countdown Timers (great for running lap times) & 5 multi-function Alarms.