I bought a set consisting of the base station along with 4 wireless sensors (one can put up to 8) ... Start-up and use VERY EASY (and manual including French, is appreciated). Everything comes with batteries quite standard: great idea! The software is on internet: no problem to download or to install it (Windows 7/64 bit), ditto for the "dongle" Wireless, I leave almost always connected through a hub USB3. External sensors are well designed, solid and well sealed ... Attention! to set or change the battery, it is quite difficult to lift the lid (due to seal): Use a flat and round tool and be careful not to break the cover. ? ... Very USE practice, the system is well designed, is evident at any time based on T ° and RH each source. It's easy and VERY CLEAR. Via the software is given a custom name to each of the sensors, and the data can easily be retrieved, hours, etc. ALL BATH ... A shame all the same: the system does unfortunately not possible to calculate the average of two times (it is sufficient that the software has been designed for this purpose) and data, even EXPORT, 3.2 are in form ... C '! is the point that bothers! But by exporting it to Excel, it is possible to solve this little problem ... I exports data (ie T ° ext. From 22:00 to 22:00) in the Excel file titled KlimaloggPro.csv, click on first column> Data> Convert ... Delimited> Next> Comma Separators> Next> Finish ... To check the date and time, selection on the first column> Column> Auto Fit Format ... Then Select All, then Edit> Replace ... to a point in "search" and a comma in "substitute" and click "replace all" ... the data is now used as 3.2 as numbers that can handle different ways. Expected accuracy? ... The resolution is 0.1 ° C while the accuracy is 1 ° C (weird right?). Anyway, I did initially operate all devices side by side and in the same environment, and all gave the same result: it's because they were "paired" car bought (!) together or are they all set the same way in the factory? Still, the accuracy seems largely sufficient. In any case, for the purpose for which I designed the system (monitoring and evaluation of two different heating systems) it is sufficiently precise and effective. In short, if you need to know the temperature and relative humidity in one or more places, I highly recommend this product: extremely interesting value for money, design, durability, tightness, ease of use ... Hopefully that it will hold up over time, but only time will confirm it ...
