I use this machine with 6 stations 30.3180.IT to wake up at the temperature and humidity in 6 rental apartments. This control panel is mounted in my 1.ten floor and there are 6 stations connected. The range of the transmitters goes smoothly through 2 concrete ceilings to the 3rd floor. Tenants often have to exaggerate the bad habit. "It's too cold or it's only 18 degrees" or "the ventilation system is not working, it is mold on the walls." I have such a tenant. He runs a laundry drying machine in the apartment, although this is prohibited by contract, and is always bleating. After I had the wall painted 2 times, because of the condensation that was then infested with mold, I was looking for such a device. So I can record anything for months and keep on my Komputer. If necessary, the records can be used as evidence. This tenant has calmed down since then I have attached the transmitter with him and had told him what the machine can do. His wife told me they would look for another apartment. Hopefully, everything will finally back to normal in the building. The other tenants had already fed up with it, because, among other things, he used all the Internet bandwidth of the building to a ton of Portugese movies downloading because it can be no other language effectively. Danne is Internet, of course with the other tenants. ALSO Letting ON UNIT HAVE WHAT YOU MUST, and price is for the many uses and FUNCTIONS absolutely ok.