Negative Positive
Title: Worked well for a while
Review: I got the ABI breathalyzer a couple of months ago and was very fond of it at first. Ok, the beeping is annoying, but it seemed to provide precise readings, which were interesting especially the day after....However, the unit got progressively decalibrated, with readings now about twice as high as they should be, and there is no way to calibrate it on your own. I will try another brand next time.
Is the review positive or negative? 