Integrated sensors constantly analyse air and displays live results. HEPA Filter captures 99.97% of particles 0.3 microns in size. Additional filter removes Odors and VOCs. Catalytic filter traps and breaks down formaldehyde molecules. Dyson Air Multiplier. Auto mode - monitors air quality and adjusts airflow. One gallon tank supports up to 36 hours of humidification. MyDyson app. Compatible with Alexa Siri and Google Assistant. Certified by the Asthma and Allergy Foundation of America. National Psoriasis Foundation recognized.