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Read more about quantification of oximeter performance on our FAQ.

'Arms' may be ascertained for manufacturers' published data, 510k reports, package inserts or primary data from testing conducted by the UCSF Hypoxia Lab.

Always check the 4 digit number that should accompany the CE marking. Read more about CE marking in our FAQ..

This is the date that the UCSF Hypoxia Lab data were collected to 'verify' or 'dispute' device performance for this site. If Arms data were obtained from a source other than the Hypoxia Lab, please review the date for that source. Of note, newer models of devices may perform differently than models tested and reported on this site.

"Ingress Protection" ratings define levels of sealing effectiveness of devices from foreign bodies (e.g. dust) and moisture. Read more at our FAQ.