Amazon offers six months of Fitbit Premium with the watch ... also sports an SpO2 pulse oximeter sensor (also found in the Charge 3, Versa, and Ionic). The sensor helps you understand your ...
The good news is that, ahead of Amazon's October Prime Day sale coming Tuesday, October 8, you can shop a variety of fitness trackers on sale right now. From Fitbit to Garmin, you can save up to ...