A3F HEPA Air Purifier for Allergies and Asthma, Smoke Odors, Large Rooms, Home, Pets, Mold, Dust Air Purifier HEPA Air cleaner for home office,Wifi Connected White1. WiFi + app, remote control of remote control through the connection of "Smart Life" app, you can know the air quality at home at any time. At the same time, it can also be remotely controlled and switched by mobile phone. The remote control is small and compact, with clear functions and simple use. 2. Filter screen replacement reminder filter element replacement reminder design. When the filter element is used for more than 1500 hours, the filter