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Sorry, there was a problem. Please try again later.Hi, there. Yes. Sense 2 tracks oxygen. Your Fitbit device uses sensors to estimate your blood oxygen saturation (SpO2) while you sleep. For more information, check out: https://help.fitbit.com/articles/en_US/Help_article/2459.htm If you need more help, please reach out to our help center: https://goo.gle/contactfitbit
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