I have tested the device extensively and I could thus make a good picture of its performance. Admittedly, the test has, at least to me, is preparing fun and headache.
The device comes with a small carrying case that I have just seen even for digital cameras. The device itself is small as a pack of cigarettes and can therefore be taken anywhere. On the unit is exactly one button: on / off.
Thus, the use would be possible without any problems in every state.
After use, the device switches itself off after a few minutes, to save power. The display indicating the alcohol content in the breath is illuminated and shows the values with two digits after the decimal point on.
The device itself is a mouthpiece (for the owner), which can go out by a situated at the top slide. However, the extension of the mouthpiece is very difficult, I had to take a coin zuhilfe, so I do not break off the nails me to the little stiff slider. The package still includes in addition to the 2 already installed batteries a few mouthpieces that you should use for hygienic reasons also urgently provided strangers blow.
The manufacturer indicates that the unit should be calibrated after one year or 1,000 measurements to maintain accuracy.
In the manual is that it should take no alcohol measuring at least 15 minutes before, because this leads to a distorted result. This I can clearly confirm. After 15 minutes I have (after filling appropriate liquids) several measurements carried out, all the same result anzeigten even at the 2nd decimal place. Thus, there is virtually no measurement tolerances, which I find very good.
If a few days after the first test, with the same test conditions (same time, same filling quantity, like food etc.) the same results are obtained as in the first test.
Due to the compactness and the legendary accuracy of the device there by myself clear 5 Stars.
