Citizen Men's AT0512-53E Eco-Drive Riva Chronograph Watch Light powered Eco-Drive Japanese-quartz movement; Charges in natural sunlight or indoor light Durable, hardened mineral crystal Case diameter: 41 mm Gold-tone-stainless-steel case; Black dial; Date function; Chronograph functions Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion