Eco-Drive - runs on light never needs a battery replacement. Global Radio Control timekeeping for exceptional accuracy. World Time by using Northern hemisphere disc. Black dial with three hands and luminous hour markers. Day of the month calendar. Gray plated stainless steel bracelet bezel and case. Chronograph pushers and outer slide rule bezel. Anti-reflective sapphire crystal. Hidden double push button fold over closure. Lug width: 22mm. Case size: 46mm. Water resistant to 200 M. 5-Year manufacturer limited warranty.