Who wants to have reliable and calibrated measurements or needs is likely to be in the right place. For example discotheque or amusement ride operators who want to test the alcohol consumption of their guests reliably likely the correct target audience be here.
You will receive this little gadget along with a carrying case, the appropriate batteries and 3 individually welded mouthpieces.
The latter, of course, rich for a regular operation is not long, but full sized mouthpieces can be bought separately.
Thus the instrument provides permanently correct results it must regularly about 1 times per year, to be recalibrated. Here one must not forget the appropriate extras.
Clean the handling aspect, the device is as simple as well:
Attach mouthpiece auspackenund, press button, wait a bit, blow into the mouthpiece, wait briefly, done!
The measurement result is displayed on a backlit display easy to read.
The display can also be read when the next calibration is due.
All in all a very good device for all have this use. For the average Joe consumer in private use, it should not be a device due to the high price