Citizen Women's Eco-Drive Silhouette Bangle Watch #EW9012-59D 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: 20 mm Gold-tone-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