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- Apple Watch Series 3 42mm Smartwatch
DetailsFeatures GPS and a barometric altimeter track how far and high you go New dual-core processor for faster app performance. Ultimate sports watch and intelligent activity tracker Swim proof so you’re always ready for the pool or ocean. Aluminum case watches' 4 is even more intuitive and intelligent Apple Watch Series 3 (GPS) requires an iPhone 5s or later with iOS 11 or later.