Casio G-Shock World Time Analog Digital GA-900-2A GA900-2 200M Men's WatchCasio G Shock World Time Analog Digital GA 900 2A GA900 2 200M Men's Watch A new, heavy duty model thats simply great for wearing in tough environments as much as within the street fashion arenas, its industrial design motif becomes prominent due to its 10 sided bezel, shaped the way of a nut and secured well by four screws that impart a tough, rugged look. Even with frequent use of all its functions, you can expect the battery to last between 6 and 7