Revamped and reinvented, the new sport styled CITIZEN Nighthawk is here to stay. Powered by any light, this watch never needs a battery. Featuring chronograph, 12/24-hour time and date in a granite ion-plated stainless steel case and bracelet with charcoal grey dial and vivid red accents. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B620.