Introducing the new Casio G-Shock GA-100-1A1ER. The 35mm diameter face and large case give it a look of power and strength. Dial rings and raised hour markers also create three-dimensional depth that gives the face plenty of character. This watch is designed and engineered to deliver outstanding shock resistance, it is 200m water resistant, and anti-magnetic. The GA-100-1A1ER is beautifully finished in black with pure white hands and a reverse LCD display for a distinctive look. Over-sized buttons come with a checkered anti-slip surface to make operations fast and sure. 1/1000-second stopwatch, velocity indicator, World Time, 5 alarms and much more provides this model with unmatched function and performance.