Quality product. The measurement of oxygen, of course, from devices of this category never has the accuracy of professional devices used in hospitals.

Quality construction. It inspires confidence and in tests with other wearables that I tried, it shows accuracy in its measurements.

Very good and reliable oximeter with large numbers that is convenient for the elderly, it does not have sound for each pulse like others (personally positive), when you wear it on your finger with your palm facing down, essentially you do not see the result of the measurement (convenient for the doctor to see the measurement), something that can be easily corrected by turning the palm upwards and at the same time turning the finger inward towards the palm.
I have compared it with 2 others and they have similar to identical measurements, and always remember that the measurements of such oximeters are indicative and not absolute, meaning if it shows 90 oxygen it does not mean that you actually have 90, and always measure while sitting (not lying down).

Good quality, good measurements with only a small delay in the beginning until it catches on after you apply it.

It is the third oximeter that I buy. It is perfect and very accurate. It has 2 plastic edges to prevent light from passing through and affecting the measurement. It is excellent.

I bought it as a replacement for my old one, which suddenly stopped working. Very high-quality construction that stands out from the crowd of 10, 20, and 30 euros. Easy-to-read screen and measures oxygen, pulse, and also has a battery indicator.