Seiko Prospex x GPS Solar ft. Dual-Time Chronograph aka Speedtimer Men Formal Round 100m Water Resistant Watch SSH165J1 SSH165 SSH-165 SSH-165J1 Discover the Seiko Satellite Prospex GPS solar chronograph, a perfect blend of advanced technology and stylish design. This timepiece features GPS functionality, solar power, and exceptional durability, making it ideal for adventurers and watch enthusiasts alike. Experience precision and reliability with this remarkable watch that adapts to your lifestyle. Caliber Number / Movement 5X83 (solar powered) Power Reserve / Accuracy Approximately 6 months when fully charged (+/-15 seconds per month without GPS signal) Crystal Sapphire crystal (dual-curved, super-clear coating) Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel (super-hard coating) case with stainless steel band (three-fold clasp with push-button release, smart adjuster function) Water Resistance 100m / 10 bar Case Size Thickness: 12.9 mm Diameter: 42.0 mm Length: 49.6 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x GPS Solar ft. Dual-Time Chronograph aka Speedtimer Made in Japan Magnetic resistance (4,800 A/m) Allergy-safe metal Screw case back DST (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 increment Power reserve indicator Overcharge prevention function Power saving function (hands stop to save power when left in the dark) Automatic hand position alignment function Day, date, 24-hour and dual-time 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)