The Apple Watch Ultra 2 and Series 9 have been given brighter displays and more power. There is also a new tracking chip and a new gesture for operation.
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Apple Watch Ultra 2 and Series 9 hands-on
Apple Watch Ultra 2 and Apple Watch Series 9 hands-on - The Verge
Apple Watch double tap gesture now available with watchOS 10.1 - Apple
Apple Watch double tap gesture now available with watchOS 10.1 - Apple
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Apple Watch Ultra 2 and Series 9 recognise finger movements - digitec
Apple Watch Ultra 2 and Apple Watch Series 9 hands-on - The Verge