Fingertip Pulse Oximeter — Prince-100B

This new model is the up-to-date version of Prince-100B series.And it shares most of the gems of the 100B series. But only
this model is capable of being water-proof, crash-proof and shock-proof. Even if you accidentally drop it, if you spill water on it or if you shake your finger while getting tested, it still can run very well.
Definitely the best fingertip oximeter so far.