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Amazon.com: CONTEC CMS50NA Pulse Oximeter SpO2 and PR Value Waveform Blood Oxygen Neck/Wrist Corda : Health & Household
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Fingertip Oximeter Pulse Oximeter Oxygen Saturation Meter SPO2, PR And PI Reading Blood Pressure Monitor. No Bluetooth. Black Color. - Newegg.com
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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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