Citizen redefines atomic timekeeping with this turbine-inspired promaster skyhawk a-t timepiece. With atomic timekeeping in 43 cities, the watch features a perpetual calendar, dual time, alarms, and pilot's rotating slide rule bezel. The 45mm case and bracelet are crafted of super titanium™. The black dial is accented with bright orange details to complete the look. Featuring eco-drive technology - powered by light, any light. Never needs a battery. Caliber number u680.