May 30 2021, 08:30 PM
QUOTE(XP750 @ May 30 2021, 08:05 PM)
guys i've already got mine, heres how to test of yours work
clip it in your finger, average reading should be about 96%
after that take a few deep breaths , you'll see the reading go up to 99%
after that hold your breath for 1min, you'll see the reading drop to 90% or below
U bought the cheapo RM18.90 one?clip it in your finger, average reading should be about 96%
after that take a few deep breaths , you'll see the reading go up to 99%
after that hold your breath for 1min, you'll see the reading drop to 90% or below
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