I have an OxyWatch C20 as well as my mother.Mine is 5 points higher and my mothers is 3 points higher than our Cardiologists mechine.Also mine has spells where it does not want to read.Being on fixed income I can not afford an expencive one.My life depends on the accuracy of this pice of equiptment.If a company is going to market this type of medical equiptment it needs to atleast be accurate simply because peoples lives do depend on them!

It is equipment that is easy to use and easy read. I just wish there was a way to register the equipment on-line.

Inferior Products. Oxywatch pulse-oximeter reads 2 points high. Does not read wife's pulse or 02 at all. Importer has no website. NOT recommended!