Citizen Men's JY0075-54E Eco-Drive Promaster Carbon Chronograph Stainless Steel Watch Light powered Eco-Drive Caliber U600 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 180 days to 30 Months 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) - 60 hrs, Outdoors, Sunny (100,000 Lux) - 20 hrs Durable, hardened non-reflective mineral crystal; Unidirectional bezel made from carbon fiber (graphite fiber)--a material that is lighter than titanium, and stronger than steel; 1/100 second chronograph measures up to 24 hours World-time in 43 cities; Multi-band atomic receiver receives signals in North America, Europe, and Asia; Perpetual calendar function; GMT display; 2 Alarms and 99 minute countdown timer Water resistant to 660 feet (200 M): suitable for recreational scuba diving