The Eco-Drive Perpetual Calendar infuses a black dial and bezel with precise functionality. Features include black ion plated stainless steel case and bracelet, one-way rotating elapsed-time bezel, which reveals the hours, minutes, and seconds on luminous hands and markers, date indicator, 12/24 hour time, 1/20 second chronograph which measures up to 60 minutes, dual time, alarm and a superior water resistance of 100 meters.