The unit looks very solid processed, a small carrying case and an additional carrying bag make mobile use possible.
It is also good that the sensor unit can be replaced, which is why you really long something has of the device.
Use: Very easy. Switching, pure blow, wait a few seconds and read the result on the illuminated display.
As always, applies here: Ca. Wait 15-20 minutes after the last alcohol consumption.
Several measurements of the test subjects always yielded plausible results (partially drunk same amount of different people and then measured, in part measurement with the same quantity carried out several times, or even the steady increase of the level observed in continuous use).
A memory function does not exist unfortunately.
Conclusion:
For whom is this device? For individuals, I think it simply too expensive (currently approx 240 euros), devices are available starting at 10 euros (which are good but then nothing, from about 100 euro is slowly in the useful range: ACE NEO).
A use in farms for occasional review or illustration of the residual alcohol I hold to be realistic. On the device itself, there is no significant criticism, so buy recommendation for all who can live with the price.
