Seiko Prospex Speedtimer GPS WatchSolar Powered MovementCaliber No: 5X83Luminous on hands and indexesStainless Steel CaseStainless Steel StrapMade in Japan14 JewelsMagnetic ResistanceThree fold clasp with push button releaseFunctions:Overcharge prevention functionPower save functionChronograph up to 12 hours in 1/20 second incrementsPerpetual calendar to the february 28, 2100World time function (38 cities)Dual-time functionDay displayPower reserve indicatorTime transfer function (Switching between the main-dial and sub-dial)GPS signal reception function (Time zone adjustment, automatic time adjustment, manual time adjustment)Satellite acquisition status display functionReception result display functionDST (Daylight Saving Time)Function to prevent the GPS signal reception (in-flight mode)Automatic hand position alignment functionCase Diameter: 42.0mmCase Thickness: 12.9mmLug-to-Lug: 49.6mmWeight: 156.0g#SSH165J1