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The Seiko Astron 7X52-0AE0 is the ultimate tech watch with a built-in GPS system. By connecting to the GPS network, the Astron adjusts at the touch of a button to your time zone and, by taking all the energy it needs from light alone, never needs a battery change. When GPS signals are received, the second hand starts moving, indicates the number of satellites, and then displays the current time.
