Both practical and fashion forward, G Shock offer us the GA-100-1A1ER watch. Featuring the latest in integrated timing technology with it's Velocity indicator, which is able to calculate speed travelled over a pre-programmed distance and world time function allowing for seamless global time synchronisation. Boasting a tough resin case, scratch, shock and water resistant mineral glass, alarm function, backward counting stopwatch function this watch should not be missed out on.Size selection: One sizeWidth: 5cmHard mineral glass and resin Black