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Amazon.com: Wellue Bluetooth Fingertip Pulse Oximeter with Pulse Rate, Blood Oxygen Saturation Monitor, Free APP : Sports & Outdoors
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Amazon.com: Wellue Pulse Oximeter Fingertip| Bluetooth Blood Oxygen Saturation (SpO2) & Heart Rate Monitor| O2 Meter 20F, Batteries and Lanyard Included : Health & Household
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