Citizen Eco-Drive x Radio-Controlled ft. Modernized Men Casual Formal Round 100m Water Resistant Watch CB5956-89L CB5956 CB-5956Discover a timepiece that combines precision and style, with a 10-month power reserve, sapphire crystal, and luminous hands and indexes. Enjoy advanced features like radio-controlled timekeeping, perpetual calendar, and world time, all wrapped in a sleek stainless steel case with metal band and 100m water resistance.Caliber Number / MovementE660 (solar Eco-Drive)Power Reserve / AccuracyApproximately 10 months when fully charged (+/-15 seconds per month)CrystalSapphire crystalLuminousLuminous on hands and indexesCase & Band MaterialStainless steel case with metal band (three-fold clasp with push-button release)Water Resistance100m / 10 barCase SizeThickness: 12.3 mmDiameter: 45.0 mmOther SpecificationsCitizen Eco-Drive x Radio-Controlled ft. ModernizedScrew case backDay, date, 24-hour and dual time displayInsufficient charge warning functionOvercharge prevention functionPower reserve indicatorPower saving function (second hand stop to save power when left in the dark)Alarm functionChronograph up to 60 minutes in 1-second incrementPerpetual calendarWorld time (24 time zones)Global radio-controlled (Japan/USA/Germany/China)Regular timekeeping (analog display)