Keep track of your most recent night-time SpO2 reading and other core stats with this stylish digital clock face. By selecting this clock face, you authorize Fitbit to use your heart rate, sleep, SpO2, and other data to show you metrics like your blood oxygen saturation levels. You can always uninstall the clock face, or delete your health metrics data or your account at any time. Fitbit SpO2 does not measure or display SpO2 values lower than 80%. Any measurement that is lower than 80% will be displayed as “<80%”. This feature is not intended to diagnose or treat any medical condition and should not be relied on for any medical purposes. It is intended to provide information that can help you manage your well-being. This feature requires more frequent charging. For more information about this app, please refer to our manual. https://help.fitbit.com/manuals/manual_spo2_en_US.pdf