Citizen Men's BL8000-11X Eco-Drive Calibre 8700 Strap Sport Watch Light powered Eco-Drive Caliber E87* Japanese-quartz movement; charges in natural sunlight or indoor light Max power reserve: 180 days; low charge warning: 3 days; charge time from stop state to max Durable, hardened non-reflective mineral crystal; case diameter: 40mm; Retrograde perpetual calendar function; alarm function; dual-time function with 24-hour sub dial Brown dial; month-day-and-date function: day indicator between 2 and three o'clock, date function at 4 o'clock; screw-back case Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving