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8
DiamondsOnTheFloor 8 points ago +8 / -0

Pulse ox is a very useful tool. Inexpensive and simple to use.

3
TheInky 3 points ago +3 / -0

Does it require needles?

2
DiamondsOnTheFloor 2 points ago +2 / -0

None! It's non-invasive. No needles, no poking, no nothing. You just rest your index finger in it and sit still for a minute or so. Easy-peasy.