Seiko Astron SSH077J GPS Solar communicates with the GPS network and adjusts to your time zone anywhere on Earth, keeping you on time all the time. Stainless steel combined with ceramic makes for a magnificent design. • Automatic hand position alignment function • Day display • DST (Daylight Saving Time) • Dual-time function • Function to prevent the GPS signal reception function from working (in-flight mode) • GPS signal reception function (Time zone adjustment, automatic time adjustment) • Overcharge prevention function • Perpetual calendar to the February 28, 2100 • Power reserve display • Power save function • Reception result display function • Satellite acquisition status display function • Time transfer function (Switching between the main-dial and sub-dial) • World time function (39 time zones) • Stainless Steel Case with Black Hard Coat • 42.7mm Case Size • Screw Case Back • Super Clear Coating • 100 Metres Water Resistant