Nice purifier. Delivered on time, packaged nicely. You download the app and register. I had a hard time pairing Bluetooth because in the directions it doesn’t say this when you’re setting up registration, you have to say OK to location services on. If you don’t, Bluetooth won’t pair. Once you pair to Bluetooth, you can switch to WiFi instead. Only thing I wish it did was oscillate. I feel it would rotate the air better. The app is user friendly. Overall good product. I like germ guardian a lot. I would recommend this product.