Citizen Men's AT0660-05F Eco-Drive 200 Meter Chronograph Sport Strap Watch Light powered Eco-Drive Caliber H50* Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 150 days; Low charge warning: 5 days; Quick start ability; Charge time from stop state to max charge: Incandescent Light - 80 hrs, Outdoors, Cloudy (10,000 Lux) - 25 hrs, Outdoors, Sunny (100,000 Lux) - 11 hrs Durable, hardened mineral crystal; Case diameter: 46 mm Titanium case; Black dial; Date function Water resistant to 660 feet (200 M): suitable for recreational scuba diving