This CITIZEN Corso collection offers timepieces accented with vibrant diamond hour markers in a combination of functional simplicity and a touch of elegance; all powered by any light with Eco-Drive Technology, not just solar. Featured here in a men's two-tone stainless steel case and bracelet with charcoal grey dial and date. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E111.