Seiko Sportura x GPS Solar ft. Navigational Men Formal Round 100m Water Resistant Watch SSF007J1 SSF007 SSF-007 SSF-007J1 Experience the Seiko Sportura GPS Solar SSF007, a Japanese-made men watch with automatic GPS time zone synchronization and solar-powered quartz movement. Featuring a 45mm stainless steel case, black leather strap, scratch-resistant sapphire crystal, and 100m water resistance for precision and durability in any environment. Caliber Number / Movement 8X22 (solar powered) Power Reserve / Accuracy Approximately 6 months when fully charged (+/-15 seconds per month without GPS signal) Crystal Sapphire crystal Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel case with leather band Water Resistance 100m / 10 bar Case Size Thickness: 12.8 mm Diameter: 45.2 mm Length: 53.4 mm Lug width: 22.0 mm Other Specifications Seiko Sportura x GPS Solar ft. Navigational Made In Japan Screw case back DST (daylight saving time) World time function (39 time zones) Power reserve indicator Overcharge prevention function Power saving function (hands stop to save power when left in the dark) Automatic hand position alignment function Date display Regular timekeeping (analog display) GPS Function GPS signal reception function (time zone adjustment, automatic time adjustment, manual time adjustment) Reception result display function Satellite acquisition status display function Function to prevent the GPS signal reception (in-flight mode)