The device is very handy and intuitive switch with a single control button to aktivieren.Einfach, blow and read the result. A backlit display ensures that the device also easy to read at night .The power take AA batteries, according to the manufacturer submits a set of about 1,000 - from 1500 measurements. Is blown into a mouthpiece that can be replaced. However, follow-up costs incurred by the calibration, which costs about 45 euros and the purchase of additional mouthpieces. To ensure the accuracy of the measurement result, calibration is recommended every 12 months.
We have the equipment now the last few weeks tested on several parties or family gatherings. Working properly and since we unfortunately had no means of comparison of per thousand, this was compared only approximately calculated with the Dräger. I would say that the instrument measures very precisely and therefore you should better give his car keys whom the tester indicates an elevated blood alcohol content. Whether the high price for a private citizen is unacceptable must each decide for themselves. Highly recommended for taxi, bus or other transport company very ..