I have worried the data Sign because I wanted to have a basis for discussion to Lueftungsverhalten. The device has the size of a matchbox obese. The housing is up to 7 holes closed and is therefore only slowly responding to CHANGES. Since I come from the technical area rather entranced me the appearance. It is what it it is what it measures what connection does what and what voltages and batteries you need. Everything as you would imagine. Respect of its accuracy and response, I can say nothing. In the absence of button cells I have meanwhile (off computer) to a powered USB hub operated. A pity is that you attach any read values to existing files, or at least CSV files can be read. So you always have to go through another program take if amn located the data will watch a second time. The installtion of the software only flap in 2nd start (Administrator privileges?). Therefore a small deduction in the B-Note.
