The Fitbit Charge 6, the latest addition to Fitbit's lineup of fitness trackers, has introduced a significant advancement in health monitoring with its built-in blood oxygen saturation (SpO2) feature.
Charge 6 is Fitbit's flagship fitness tracker band. The follow-up from Charge 5 features some tweaks under the hood, but little in the way of design changes. To the untrained eye, they look the same.
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