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Amazon.com: Vibeat Fingertip Pulse Oximeter, Blood Oxygen Saturation Monitor| O2 Meter, Portable SPO2 & Pulse Rate Monitor, Batteries and Lanyard Included : Health & Household
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Amazon.com: Tomorotec Fingertip Pulse Oximeter Accurate Blood Oxygen Saturation Level (SpO2), Perfusion Index (PI), Pulse Rate (PR), Respiratory Rate (RR) Monitor with Lanyard [Sports & Aviation Use Only] (Black) : Health &
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