A:Answer Daisy, be very carful of buying the Series 9 watch if you are looking for the Oxygen meter. Apple discontinued importing the Series 9 with the Oxygen meter active. The watch still says it is on there but you are unable to access it. I purchased a series 9 a few days after the embargo (mid January '24)from BestBuy. BestBuy was the only place I could still find the older stock of Series 9 with the Oxygen meter still usable. It says in the sales description that it is available on that particular watch. If it doesn't specifically say it has it, it probably doesn't. You better move fast before BB runs out of the older stock. Check their online sales if it isn't in your local store.