The Choice Model MD300-C634 is based on Beijing Choice Medical's uniquely patented algorithms that use dual 'see-through' sensor technology for the accurate measurement of blood oxygen saturation levels and heart pulse rate. Beijing Choice Medical was the first oximeter manufacturer from China approved by the FDA for sale of its oximeter in the USA as a medical product.
Choice Model MD300-C634 finger pulse oximeter will NOT monitor SPO2 during activity and movement. You must stop the current activity and take the reading while stationary. Movement will cause readings to be affected by artifact.
Aviation Pilots love Choice Model MD300-C634 because it allows them to quickly assess their SPO2 while flying at high altitudes. Hypoxia can be a pilot's worst enemy, and the Choice Model MD300-C634 finger pulse oximeter is a low-cost product which gives pilots peace of mind.
*** BEWARE: Pulse Oximeters that state that they are not approved by the FDA are Non-Medical Devices that have not passed the stringent FDA 510k Pre-Market Approval Process ***
The Choice MD300-C634 is an Oximeter that is FDA 510k Approved for Medical Use
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MD300C634 
MD300C634