A:AnswerThis is wrong. There are only two p ieces in the package. This band is either S/P or L/G. BEST BUY does not differntial the size on their website or on eBay. You have to buy one from the store to assure you get the size you want.
A:AnswerYes, it monitors oxygen saturation levels overnight only. So when you sleep with the FitBit Sense, it will convert different metrics in the morning to give you an overnight oxygen saturation range.