G-Shock GA2100FF-8A Watch. Travel back to futures past with G-SHOCK retro-futuristic designs in metallic silver. Imaginative vintage visions of what the future would hold are projected in the classic DW5600, the GA700 and GA2200 with their iconic large cases, and the octagonal design of the GA2100. Yesteryear futures in ethereal metallic silver, straight from the pages of classic science fiction, are here and now. Case size: 48.5 × 45.4 × 11.8 mm. Weight: 51 g. Resin case and bezel. Resin band. Shock resistant. Carbon core guard structure. 200-meter water resistance. Approx. battery life: 3 years on SR726W X 2. 1/100-second stopwatch. Countdown timer. 5 daily alarms. Double LED light. Full auto-calendar (to year 2099). Accuracy: +/- 15 seconds per month. 12/24-hour format. Imported.