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Amazon.com: Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor Pulse Ox, Heart Rate and Fast Spo2 Reading Oxygen Meter with OLED Screen Included Lanyard and 2 X AAA Batteries : Health & Household
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Amazon.com: iProven Pulse Oximeter Fingertip - Blood Oxygen (O2) Saturation Level Monitor - with Heart Rate Detection - Oximetro De Pulso - Finger Oximeter with Pulse Indicator - Best Accuracy by OXI-27
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