Back in April, I bought this unit and sent it to my wife's family in New Jersey. I spent some time googling what to get; I found several discussions on Reddit w

Back in April, I bought this unit and sent it to my wife's family in New Jersey. I spent some time googling what to get; I found several discussions on Reddit where doctors and med students agreed that the "Zacurate" units reliably matched their hospital units. https://www.amazon.com/Zacurate-Fingertip-Oximeter-Saturation-Batteries/dp/B01HSAG8BE https://www.amazon.com/Zacurate-Fingertip-Oximeter-Saturatio...