A:AnswerHi, there. If you're referring to the blood oxygen saturation (SpO2),the Fitbit Sense 2 can measure this. For more information, please visit this: https://support.google.com/fitbit/answer/14226120
For any additional questions and concerns, reach us at: https://goo.gle/contactfitbit
A:AnswerHi, Tony. To set up and use the Fitbit Sense, you must install the Fitbit app. The Fitbit app is free, and you don't need to pay for a premium subscription to use it. For more information, please visit this: https://support.google.com/fitbit/answer/14237011
For any additional questions and concerns, reach us at: https://goo.gle/contactfitbit
A:AnswerHi, Rick.We're sorry to hear that your Fitbit Sense 2 battery is draining quickly. We recommend restarting your Fitbit Sense 2 by following the steps here: https://support.google.com/fitbit/answer/14194938
You can also try these battery saving tips: https://support.google.com/fitbit/answer/14226518
For more information about our warranty policy, visit fitbit.com/global/us/legal/returns-and-warranty
For any additional questions and concerns, reach us at: https://goo.gle/contactfitbit
