Review on 🌬️ Germ Guardian Wi-Fi Bluetooth Smart Voice Control Air Purifier CDAP5500BCA, UV Light Sanitizer Eliminates Germs, Mold, Odors, True HEPA Filters Allergies, Pollen, Smoke, Dust, Pet Dander, 28-inch 4-in-1 by Michelle Langley

We have had several previous versions of this product. They work well as air purifiers. Effectively removes odors from the air. My wife and a couple of friends are very sensitive to allergens and mold and clean the air very well (for the price). I had no trouble connecting them to Wi-Fi and the app like other browsers. However, do not trust the particle counter. The attached image shows two identical models, purchased about a week apart, in the same room about a foot apart. The one on the left says the PM is over 600 and the one on the right says it's 3. It always says it's 3. Well it's not quite right, sometimes it goes as high as 7 or 15. But the left one sometimes stays at 3 if you leave the fan setting at 1, but as soon as you increase the fan speed it jumps from 150 to over 600. So. good purifier but I almost didn't add a PM sensor with them because it would be better not to say anything about the air than being paranoid every time you look at it that something is wrong with your air.