Citizen Men's BM0192-59E Eco-Drive Gold-Tone Stainless Steel Watch Light powered Eco-Drive Caliber E111 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 180 days; Low charge warning: 4 days; Quick start ability; Charge time from stop state to max charge: Incandescent Light - 120 hrs, Outdoors, Cloudy (10,000 Lux) - 35 hrs, Outdoors, Sunny (100,000 Lux) - 11 hrs Durable, hardened mineral crystal; Case diameter: 36.8 mm Gold-tone-stainless-steel case; Black dial; Date function Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving