Access Anywhere, Anytime Simply ask Alexa or Google Assistant to control the air purifier when your hands are full. The free VeSync app also allows you to check your air quality and set schedules. True HEPA 13 Filtration System and More Activated Carbon The True HEPA 13 filtration system helps you combat dry throats, nightly congestion, allergies, and asthma. The air purifier Adopts high-tech inset 300g activated carbon in the air filters, which can remove 99.97% dust, pollen, smoke, odors, mold spores, pet dander, and chemical pollution. The air filters can catch particles as small as 0.3 microns. PM2.5 Display & Easy operation & 5-Level Fan Speeds & International Certification Built in PM2.5 sensor, which can directly monitor PM2.5 concentration and display it.3-Stage Filtration System and 5-Level Fan Speeds, Adjusting the air purifier fan speeds selected according to the practical air quality and space.