Citizen Men’s Eco-Drive Satellite Wave GPS Timekeeping System with Worldwide Reception Area. World’s Fastest Timekeeping Signal Reception Speed From GPS Navigation Satellites – As Quick as 3 Seconds. World Time in 27 Cities (40 Time Zones), Perpetual Calendar, Daylight Savings Time Indicator, Power Reserve Indicator, Light Level Indicator, Day/Date. Black Stainless Steel with Green Accents. Water resistant to 100M. Citizen Eco-Drive watches charge by any light source and never require a battery replacement. Industry-leading 5-year warranty.