Citizen Women's EP5810-61D Eco-Drive Interchangeable Crystal Bezel Watch Light powered Eco-Drive Japanese-quartz movement; Charges in natural sunlight or indoor light Durable, hardened mineral crystal Case diameter: 28.8 mm Stainless steel case; Mother-of-Pearl dial Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion