Light powered Eco-Drive Caliber C650 Japanese-quartz movement; charges in natural sunlight or indoor light Max power reserve: low charge warning: 1.5 days; charge time from stop state to max charge Time and calendar: 30 cities, chronograph; blue angels sky hawk: titanium Rotating slide rule bezel; One-touch interchangeable analog-to-digital times Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving