A:AnswerIt has the capability to but Fitbit has not enabled it. The charge 2 had the sensor as well but has never been enabled in the over a year it has been out.
A:AnswerAccording to the Fitbit website specs page, this is waterproof up to 50m. There are only two Fitbit models that are waterproof, the versa and the charge3. All of the others are water resistant, which means protected from splashes and spills but is not immersable. I have been waiting on the charge3 since I swim daily and want this activity counted. I can’t wait until mine arrives!
A:AnswerIt's nice to be able to add steps manually if you were charging it or for some reason you weren't wearing it for while. You could add in an estimate of steps while you didn't have it on.
A:AnswerI have the Charge 3 and it does not measure BP. However, the pulse and O2 measures are used to calculate heart health. I love the Charge 3 as it does not flood the user with details, but the phone app does. nice device.