The equipment arrived in due time despite a return Chartres - Lyon knowing that I'm on Le Mans. I start by checking the contents: RAS (although I have not found a book on clouds, contrary to what was indicated). It is just a pity that not delivered a 6V transformer for the main display. The battery is polluting !. At the assembly, it's simple. As the sensors I positioned the thermo hygrometers 2 one next to the other. The temperatures were the same. For cons, I have observed deviations from 4% in relative humidity. The software is comprehensive and easy to use. It is a complete product and adapted to my needs amateur.