Walmart has massively marked down a highly-rated pulse oximeter that's designed to monitor your heart ... "I've had many different oxygen meters and this is by far the best. It gives an almost ...

When you're comfortably seated, place your index or middle finger inside the pulse oximeter ... The easiest way to monitor your blood oxygen levels at home is to use a pulse oximeter.

Walmart's Vibeat Pulse Oximeter, Bluetooth Finger Oxgyen Monitor with Heart Rate ... "I've had many different oxygen meters and this is by far the best. It gives an almost immediate reading ...