Citizen Men's JR3155-03E Eco-Drive Black Skyhawk Watch Light powered Eco-Drive Caliber C650 Japanese-quartz movement; Charges in natural sunlight or indoor light Max power reserve: 90 days to 4 Years with Power Save; Low charge warning: 1.5 days; Charge time from stop state to max charge: Incandescent Light - 29 hrs, Outdoors, Cloudy (10,000 Lux) - 9 hrs, Outdoors, Sunny (100,000 Lux) - 5 hrs Black ion-plated case & polyurethane band; Time and calendar in 22 time zones (30 cities); Three world-time alarm functions; One-touch interchangeable analog-digital times 1/100 second chronograph measures up to 24 hours; 99 minute countdown timer; Rotating slide rule bezel; Screw back case Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving