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View 1 of HOLFENRY Pulse Oximeter Fingertip - HOLFENRY Oxygen Monitor Fingertip Mini SpO2 Pulse Oximeter Oxygen Saturation Monitor for SpO2/Heart Rate/PI Pulse OxView 2 of HOLFENRY Pulse Oximeter Fingertip - HOLFENRY Oxygen Monitor Fingertip Mini SpO2 Pulse Oximeter Oxygen Saturation Monitor for SpO2/Heart Rate/PI Pulse Ox