men’s watches with real-time heart rate and activity tracking features -Seiko Astron Men's 43.10mm Stainless Steel Solar GPS Watch SSH121J

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Astron GPS Solar is one of the world’s most advanced wristwatches. It adjusts at the touch of a button to your time zone by connecting to the GPS satellite network. It takes all the energy it needs from light alone and yet delivers the unsurpassed precision of an atomic clock. It even connects automatically up to twice a day to the satellite network to ensure its accuracy. It is the perfect timepiece for the global traveler.