FYI, for any of us looking for relatively inexpensive fingertip pulse oximeters see:

 

$27 http://www.amazon.com/Contec-CMS50L-Fingertip-Pulse-Oximeter/dp/B002BUYSDC/ref=sr_1_2?tag=slickdeals&ie=UTF8&qid=1288343793&sr=8-2

 

or

 

$36 http://www.amazon.com/Finger-Pulse-Oximeter-SM-110-Carry-Wrist/dp/B003TJH3LI/ref=sr_1_1?tag=slickdeals&ie=UTF8&qid=1288343793&sr=8-1

 

Don’t know the difference.  Just ordered one of each and will report back in a couple weeks.

 

RickT