First time automatically stacked.

Clocks synchronized with an atomic clock is not accurate anywhere. They contain a radio transmission picked up signal from a short-range tower on atomic clocks around the world.

But the towers have a range of only 2,400 km, leaving large regions, such as South America and Canada. Seiko Astron is the first watch that uses GPS, so you can automatically synchronize the time anywhere.




Seiko's engineers have connected Astron's quartz movement with a custom circuit, which contains a processor and radio GPS.
Team processor programmed with a map of the world divided into one million square quadrants, each associated with one of 39 time zones.
Once a day, radio with GPS turned on and connected to four or more satellites orbiting the globe to pinpoint its location; processor then determines which area is the time and set the date and time accordingly. (Users can also synchronize by pressing a button on its side.)
Astron-it needs 30 seconds to synchronize and atomic clocks may require up to 2 minutes.
Because the surface of 1.5 inches of lithium ion is composed of a matrix of 7 solar cells, travelers will not have an hour never incorrect or stopped.