After reinforced presence of mold in the kitchen I have some time before the device - very inexpensive - acquired. Only küzrlich I have another kitchen wall, which had already recognized many times mold, again renovate / refurbish need. Thanks to this device, I immediately was able to determine where the risk particularly of moisture places this wall, and have obtained obvious results, so I assume that I - is spared a renewed mold growth at these sites probably - according to corresponding measures. I was so in good conscience continue to renovate / finish. The very small, handy, practical and, above all, inexpensive device was a big help for me. I can therefore only recommend.
The little "rounder" but can the like more than just the moisture in plaster measure: if you change the mode, you can therefore measure wood. In another mode, even the (air) temperature!
The operation is simple: just use the button to switch on the device. Longer Pressing and holding the button allows you to switch to another mode, you dan then by change by pressing the button once briefly (the one wiederhaolt then, until you are in the "right" mode). - So is really convenient "foolproof".