Do NOT waste your money on this. Does not work easily AT ALL.
I just got this.  I don't drink. I blew into it and I registered at .17  So, this won't help when I need to see what others in family are registering at.  As well, this is the HARDEST machine to use. It worked ONE time. You turn it on, and have to change it too farenheit.  Then, it turns off... then you are supposed to press power button for two seconds, and it's supposed to do the countdown to then blow into it. This only worked ONE TIME.  The other 20x we tried, it would go back to the screen of setting the temperature from Celcius to Farenheit.  I mean, damn, this shouldn't be that hard. Grossly disappointing and a waste of my time!!!!  I needed something that worked.  No way on this item. No way.
Rating: 1 stars