Citizen Women's EW1370-52D Eco-Drive Aviara Sport Diamond Accented Watch Light powered Eco-Drive Caliber E010 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 178 days; Low charge warning: 5 days; Quick start ability; Charge time from stop state to max charge: Incandescent Light - 72 hrs, Outdoors, Cloudy (10,000 Lux) - 22 hrs, Outdoors, Sunny (100,000 Lux) - 11 hrs Durable, hardened mineral crystal Stainless-steel case; Mother-of-Pearl dial; Date function Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving