01-26-2012, 12:58 AM
(01-25-2012, 09:11 PM)Maggot Wrote: 7/11 does that finger sucking oxygen tester make a sucking sound? Would it with vaseline? Last but not least .....Is it portable?
have you never had your O2 levels tested with one? No it does not make a sound. You don't feel a thing. You can get a portable one. Vaseline would compromise the reading.