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Pulse Oximeter Fingertip, Heart Rate Monitor with Large LED Display, Blood Oxygen Saturation Monitor for Adults and Kids, Accurate Fast SPo2 Reading Oxygen Meter with Lanyard (Black-Silver) - Walmart.com
Santamedical Fingertip Pulse Oximeter, Blood Oxygen Saturation Monitor (SpO2) with Pulse Rate Measurements and Pulse Bar Graph, Portable Digital Reading LED Display, Batteries Included - Walmart.com