I eventually do some charity work. I met this old lady in a retirement home that was on oxygen and needed to keep track of her oxygen level. So I bought this oximeter for her. It works very well (according to a nurse at the retirement home) and was way less expensive than most oximeters I found. I definitely recommend it.
PS. Great customer service from Centaurus Medical. Get more detail about Handheld Pulse Oximeter MD300I.
