KingtaNahiro Yousnerc Retractable Folding Stools Portable Plastic Stool Travel Seat Telescopic Plastic Stool Shrinkable Camping Fishing Garden Folding Chair

I was told to monitor my blood oxygen levels. This little guy does the trick. Sometimes it takes a second to give me the results but it does it and they seem accurate. I don’t like the lanyard it came with but that’s a rather petty complaint for what it does. All in all, I’m happy

Does exactly what was promised... O2 saturation reading in 5-10 seconds. Much bettter than another brand I bought.

I have used on a lot of people with great accuracy.