The device itself is smaller than my smartphone. The mouthpiece can be inserted into the head region and then inspected before just 2 cm. It is withdrawn so it can already be transported fully functional for use.
In the hand it feels stable and compact. The exterior looks like a MP3 player from the last decade.
In self-test, the device is a self-perpetuating: switch on, blow clean with force and check the digital display work. The result is displayed very quickly (almost faster than the operability for switching is present) and should be accurate to +/- 0.05 per thousand. The height of the displayed value has surprised me all three times and especially the value for a restaurant visit with food and related beverages has led me once again clearly demonstrated that the return should be clarified in such meetings in advance. Here, self-perception and measurement result is vastly different.
The digital display is illuminated and has made in restaurants or pubs a good representation of the determined value per thousand.
Important: according to the enclosed instructions should be passed 20 minutes between the last beer and the test. Otherwise, the residual alcohol in the mouth distorts the result.
Positives: The sensor of the device is interchangeable, as are the batteries. Thus it is not only smaller than current smartphones, but from more maintainable. The exchange should lt. Manufacturer once per year and suggests a cost of around 40 to book.
When blowing sounds mechanical, noticeable sound when everything has gone right so that measurement errors are prevented.
Negatives: The device does not provide for Speicherfuntkionen previous results or profile systems for different users.
The protective case has no pocket for a fresh mouthpiece and has a perceptible odor during the first days on. This goes, however, if you put the case for one or two days on the windowsill with the windows open.
All in all, equivalent to a well-usable device whose lack of adjustment options, or even access to Android or PC systems but the appearance of the last decade. For the price I would have expected more in this connection, especially a longer term use attracting follow-up costs of approximately 40 / anno with it.
