This pulse oximeter came quickly and was a great price. It arrived neatly and safely packaged in a small box. After opening it, I found the directions placed right on top, which were incredibly easy to follow and understand. Next, came the pulse oximeter, which had a layer of film protecting the lcd screen. New batteries were located below the pulse oximeter. I literally installed the batteries and it was ready to go. You place it on your finger, press the button, and let it do the work. I think it got a super accurate reading within 5-10 seconds.
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