But It measures nowhere near alcohol levels, but only to show whether one is already over 0.5 per mille or not. However, this result of the measurement is not really to be trusted:
1. It is relatively difficult to read because the test strips turns very soft from yellow to green.
2. If one is already drunk properly, still appears just below (in another test just above) the blood alcohol limit, which is probably not entirely true.
Under perfect conditions executed may provide correct results of breathalyzer, but actually it is only good as a party gag.
