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Or it uses GPS to auto-auto-change. |
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The U.S. atomic clock, and similar radio signals are already being broadcast and used by devices such as this http://www.valcoelectronics.com/oregon/rm323a.htm |
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A watch version does exist, but I could not find a link to it. You press a button and it searches for the nearest update location. |
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Broadcast frequency is typically in the 80 to 100kHz band (yes kilo-hertz) and bit-rate is a low 10 to 30bps. Microsoft is actually considering riding ads on this system that will allow things like fridge magnets that periodically show different products. |
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