Fingertip Pulse Oximeter reducing the size of standard OUT OF STOCKS NASOCLEAR BUT YOU MAY OPT TO BUY FOR EQUIVALENT COST EFFECTIVE BRAND::BUYING FOR COST EFFECTIVE EQUIVALENT BRAND: CLIRNAZE reducing the size of standard particles from more then 20 micron to less than 2 micron [1][2] It prevents airborne transmission of infections between patients and or treating personnel by blocking the movement of pathogens (primarily bacteria and viruses) shed in respiratory droplets and aerosols into and from the wearer's mouth and nose or the oxygen levels in your blood It can rapidly detect even small changes in how efficiently oxygen is being carried to the extremities furthest from the heart