Citizen Men's BL8040-50E Eco-Drive Calibre 8700 Diamond Watch Light powered Eco-Drive Caliber E87* Japanese-quartz movement; Charges in natural sunlight or indoor light; Citizen Eco-Drive diamond watches feature conflict-free and single cut diamonds Max power reserve: 180 days to 1.5 Years with Power Save; Low charge warning: 3 days; Charge time from stop state to max charge: Incandescent Light - 150 hrs, Outdoors, Cloudy (10,000 Lux) - 45 hrs, Outdoors, Sunny (100,000 Lux) - 8 hrs Durable, hardened non-reflective mineral crystal; 36 Genuine diamonds-accented bezel; Case diameter: 39mm; Retrograde perpetual calendar function; Alarm function; Dual-time function with 24-hour subdial Stainless steel case and matching bracelet; Black dial; Month-day-and-date function: Day indicator between 2 and 3 o'clock, Date function at 4 o'clock Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving