There are already various types of watches that receive time information from external sources. For example, the radio-control watch delivers the most accurate time, but only in the limited areas. There are 39 time zones on earth, and only Astron recognizes all of them.
Actually Astron sees the world in 1 million squares and attaches a time zone to each.
Only Astron recognizes all 39 time zones.
Only Seiko has the most efficient energy management technology.
The secret is energy management
The most important advances in watchmaking are all about creating and using energy more efficiently.