I’m extremely sensitive to air pollution, especially from vehicles, so I live in my RV, and search out, and stay in, clean air areas. I’ve been using the Purple Air map and Air Now to find those places. I’d also like to have a monitor of my own, so I can monitor the air quality at my location, and share it with others. I was looking at the Gaia A-12 monitor, but I can’t get Gaia to answer my questions about it, even after I placed the order, but havn’t actually paid for it. So, I’m thinking Purple Air might be the way to go. The communication here seems good.