Citizen Women's EW9270-53E Eco-Drive Silhouette Bangle Watch Light powered Eco-Drive Caliber B023 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 1 Year; Low charge warning: 14 days; Charge time from stop state to max charge: Incandescent Light - 75 hrs, Outdoors, Cloudy (10,000 Lux) - 30 hrs, Outdoors, Sunny (100,000 Lux) - 7 hrs Durable, hardened mineral crystal; Case diameter: 21 mm Stainless-steel case; Black; dial Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion