The sensor seems to be well built and functions quickly. However, I find there are differences in the readings from one finger to the same finger on the opposite hand. Some times as much as 10 numbers. I intend to compare my unit with that of my doctor, to verify accuracy. In the meantime. I am somewhat doubtful of the consistent reasonable accuracy of this unit. The pulse portion of the meter also varies, sometimes four or five beats per minute, either fast or slow, when compared with actual pulse taken on wrist.
Verified purchase: Yes | Condition: New
Unit works very well. When you need to know your O2 reading its quick and easy.
Verified purchase: Yes | Condition: New
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