Citizen Women's FB1000-50D Eco-Drive Calibre 5000 Watch Light powered Eco-Drive Caliber H504 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 180 days; Low charge warning: 5 days; Charge time from stop state to max charge: Incandescent Light - 110 hrs, Outdoors, Cloudy (10,000 Lux) - 30 hrs, Outdoors, Sunny (100,000 Lux) - 12 hrs Durable, hardened mineral crystal; Case diameter: 33 mm Stainless-steel case; Mother-of-Pearl dial; Date function Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion