I can answer your first question: According to the Mayo Clinic & other medical websites, the normal oxygen saturation level for adults is 95% - 100%. As you continue to wear your Charge 5 at night, it will gather more data to develop your personal range.
Hopefully, someone else will respond regarding your second question.
Rieko | N California USA MBG PE
Best AnswerThanks a bunch...now waiting for an answer from someone in regards to the sudden intermittent flat lining I'm starting to see.
Best Answer