My late husband used to carry this pulse-ox in his pocket so if he wasn't feeling well he could check his vitals and then his blood sugar to find out what the problem may be. He loved having it

This pulse oximeter works well, is lightweight and pretty handy. It seems to accurate.
My only complaint is that at night it's a bit difficult to read.

Like the product

I'm in the position now where taking (and tracking) my vitals at least once or twice a day is gaining in importance. My (our) state health insurance has a "points/rewards" system that is surprisingly pretty good as to the quality, and useful variety, of items and products one can get. Last 'cash-in' time I was able to get a blood pressure monitor and a no-touch thermometer "gun" from the catalog but ironically there wasn't any oximeters available at the time, so I just went ahead and bought this one to round out the set.

This thing cannot be any simpler to get ready and use; open package, install batteries, turn on, put on finger, read the results, turn off and stow away until next time. The only way it could be easier is to have someone else doing it. The 21st century First-Aid kit has come a long way since the days of just old glass tube, mercury filled thermometers; more effective and accurate tools now exist, and they're readily available. This was neither the cheapest nor most expensive and seems identical to the ones in the doctors' offices and hospital. Stuff like this is pretty much a binary situation - either it works - or it doesn't work - as expected, and this one certainly does. If I said I'd swiped it from the ER, you couldn't tell the difference.
I'm finally aging out of needing to bandage/tend wounds/injuries 2 or 3 (or more) times a week and progressing into disease monitoring, treatment and alleviation. 30 years of residential construction left me with more than just an impressive collection of scars, the real damage done is internal and now it is coming back around to claim it's just dues. Now when I have one of my episodes of dizziness, or not being able to breath, I can get better data to assess what the heck may be going on.
IF there is a final step to/for it, that would be to get a daily record for a period and compare it to what the doc sees in the office; beyond that it would require some sort of device calibration access to ensure the accuracy of the data collected. About the only way I can think to check all that is take my devices in with me to the next appointment and check them against the equipment in the office - which we very well may do. Data is useless if it isn't accurate.

This seems like a nice pulse ox. I have been a RN for 30 years, this looks and feels like the portable ones I have used in the past. I reviewed many of the brands and tried to buy the most accurate, I wish I had a method to check its accuracy. I will notice the readings going up and down when I use them at night. This very well could be because my oxygenation is fluctuating, which I was suspecting and is why I bought it. To test it's accuracy in bed when I felt a bit short of breath, I would hold my breath, in about 30-45 seconds my sat levels drop and it will recover in about a minute according to this device. So I believe it is fairly accurate ..and I am concerned for my heart and lungs :( I think this will give me some valuable info