Redefining atomic timekeeping with a turbine inspired bold and powerful timepiece. The newest edition of the Citizen Skyhawk A-T collection is remarkably dynamic and visually appealing. With atomic timekeeping is 43 cities, this chronograph watch features a perpetual calendar, dual time, alarms, countdown timer, digital backlight and UTC displays, power reserve and pilot's rotating slide rule bezel. This model appears with a honed stainless steel case and bracelet, black dial, bright green details and black bezel with unique case and dial motifs.Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number U680.