Finger Oxygen Saturation Oximeter, Pulse Oximeter with Alarm, Ideal for Quickly Measuring Oxygen Saturation, Simple Oximeter, Including Lanyard. (Not Including Battery) (4 Work Patterns Comes with an Alarm function: alarm can be switched on or off.
1pc Portable Oximeter with Lanyard Accurate Blood Oxygen Saturation Monitor with Pulse and Heart Rate Display Easy-to-Read LED Display for Medical Use, Home, Sports
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