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Not as easy to use as it says. I have used it about 6 times but if not careful you can rack up the numbers by not understanding how it works. It records the times you use it even if not used correctly. If you have a weak breathe do not buy it has you have to blow into it for a long time for it to eventually read. To me not worth the money sounds very good but to hard to use.
Verified purchase: Yes | Condition: New
Great product
Verified purchase: Yes | Condition: New