Seiko Astron x GPS Solar ft. Dual-Time Chronograph ft. Future Innovation (Limited Edition of 1,200 Pieces) Men Formal Round 100m Water Resistant Watch SSH185J1 SSH185 SSH-185 SSH-185J1Explore the limited edition Seiko Astron SSH185J1 Limited Edition GPS Solar watch. Its super-hard-coated titanium case and bracelet ensure lightweight durability, while the striking black dial with green accents houses the advanced Caliber 5X83 movement for unparalleled global accuracy and a 6-month power reserve. A fusion of innovative technology and sophisticated design.Caliber Number / Movement5X83 (solar powered)Power Reserve / AccuracyApproximately 6 months when fully charged (+/-15 seconds per month without GPS signal)CrystalSapphire crystal (dual-curved, super-clear coating)LuminousLumiBrite on hands and indexesCase / Band MaterialTitanium (super-hard coating) case, ceramic / aluminium bezel with titanium / ceramic band (three-fold clasp with push-button release, smart adjuster function)Water Resistance100m / 10 barCase SizeThickness: 13.4 mmDiameter: 43.4 mmLength: 49.5 mmLug width: IntegratedOther SpecificationsSeiko Astron x GPS Solar ft. Dual-Time Chronograph ft. Future Innovation (Limited Edition of 1,200 Pieces)Made in JapanMagnetic resistance (4,800 A/m)Allergy-safe metalScrew case backDST (daylight saving time)World time function (38 cities)Time transfer function (switching between main and sub-dial)Perpetual calendar (to 28 February 2100)Chronograph up to 12 hours in 1/20-second incrementPower reserve indicatorOvercharge prevention functionPower saving function (hands stop to save power when left in the dark)Automatic hand position alignment functionDay, date, 24-hour and dual-time displayRegular timekeeping (analog display)GPS FunctionGPS signal reception function (time zone adjustment, automatic time adjustment, manual time adjustment)Reception result display functionSatellite acquisition status display functionFunction to prevent the GPS signal reception (in-flight mode)