Buying guideWeight6 min read8 sourcesIn the back pocketHome Pulse Oximeters: What Accuracy Claims Mean and What Is Worth Paying ForA fingertip oximeter shows two main numbers. SpO2 is your blood oxygen saturation as a percentage, and PR is your pulse rate. Some models add a third indicator for signal strength. The FDA's consumer guide says most healthy people read…InsideWhat the accuracy number on the box actually meansMedical-purpose versus wellness: the label that matters mostWhat to pay for and what to skipCheap does not always mean wrong, but you can't tell which is whichRead the guide →