It works exactly as I expected. The solar panel is enough to keep the display charged. Individual tire valve sensors updated the display within the first few minutes of your drive. I wouldn't buy it again just because it's a complicated solution to a simple problem. Journey after journey is almost the same. I don't have a leak in either tire so the display doesn't provide the information I need. If I had a trailer, I would definitely pay attention to the tires on the trailer. I could take it off and bring it back for new tires or for long trips.