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Amazon.com: Pulse Oximeter Fingertip - Oxygen Meter Finger Pulse Oximeter - Blood Oxygen Saturation Monitor with Heart Rate and Fast Spo2 Reading, Pulse Ox with TFT Screen, Lanyard (Not include Batteries) :
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Amazon.com: Zacurate 500G Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor with batteries and lanyard (Arctic Blue) : Health & Household
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