Lightweight multifunctional watch from G-SHOCK . The sturdy, compact movement of the G-SHOCK GA-2100-1A1ER combines the latest Carbon Core Guard technology in a slimmer, more refined case.Inspired by the original 1983 model, the DW-5000C, this watch pays homage to the popular retro look with its unique octagonal silhouette framing an analogue-digital display.Despite its deceptively compact design, this watch is durable and robust, with a water resistance of 200 metres and the world-renowned G-SHOCK shock resistance.The multi-function alarm, dual time zone display, workout timer and gadgets like the automatic calendar make this sturdy watch an organiser to help you out on busy days.