****Irregular heart rhythm notifications are only available in select countries and with select Fitbit products not intended for use by people under 22 years old or with other known arrhythmias. The SpO2 feature requires more frequent charging. It is intended to help you manage your well-being and keep track of your information. The SpO2 feature is not intended to diagnose or treat any medical condition or for any other medical purpose. Significant changes in ambient temperature may negatively impact skin temperature tracking. Skin temperature is only available in the Fitbit app and only displays variation. ***Skin temperature variation and SpO2 are not available in all markets. Get 24 hours of charge with 12 minutes of charging. **Varies with use and other factors up to 12 hours with continuous GPS. *The Fitbit ECG app is only available in select countries and with select Fitbit products not intended for use by people under 22 years old.
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