 The sulfurous odors of, well, the progressives coming through, they eliminate litter box odors, smoke odors, you name it. I've used them in hotel rooms. I've used them in rental cars. They're small. You can travel with it in your travel bag. You can get three of them for upstairs, downstairs, your basement, your RV, your travel bag, wherever you need them. EdenPureDeals.com. The discount code is ERIC3. And they're filterless, so you don't have to get a filter scripture. You just buy them and use them. They're great. I've been in hotels that used them, even as I've taken them with me. They're small. You can plug it in with a USB cord. You can plug it directly into the wall, and they just work.