Redefining atomic timekeeping with a turbine inspired bold and powerful timepiece. The newest limited edition watch in the CITIZEN Promaster 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 grey-tone stainless steel case and luxurious black leather strap with contrast stitching and grey/green dial with unique case and dial motifs. Featuring our Eco-Drive technology ? powered by light, any light. Never needs a battery. Caliber number U680.