Fitbit Premium is a new ... Said graph is generated from data sourced from the red and infrared sensors on the Versa 2. This will alert you to 'short-term variations in the oxygen levels in ...

which has more of a red tint than the Soft Gold color. Straps are swappable on both models, with a huge range of compatible options to choose from, both from Fitbit and third-party brands. Fitbit ...

the Fitbit Versa 4 and the Fitbit Sense 2. Although they offer a similar experience as some of the best fitness trackers, a few differences set them apart. Namely, the Sense 2 offers more extras ...