When Fitbit launched the Charge 4 fitness band, one of the features we found the most interesting was its ability to estimate users' blood oxygen saturation levels through its SpO2 monitor. Users ...
With the latest update, a new health feature is coming to the Fitbit Charge 4 fitness band. The Fitbit Charge 4 update adds the on-device SpO2 functionality. Previously, checking SpO2 levels was ...
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