UPDATE: 2024/01/18 11:27 EST BY CORBIN DAVENPORT
Blood Oxygen feature will be removed in the U.S.
Apple has now confirmed that all Apple Watch Series 9 and Apple Watch Ultra 2 smartwatches sold after January 18, 2024 will be blocked from detecting your blood oxygen level. The affected models have "LW/A" at the end of the model number. Apple Watch models sold outside the United States are not affected.