Effectively purifies air in a large rooms 300-600 square feet with a 4-stage hospital-type filtration. AeraSmart™ Sensor monitors the air quality and automatically adjusts the fan speed to keep your air purified. True HEPA filter with AeraSafe™ antimicrobial treatment safely removes 99.97% of airborne particles as small as 0.3 microns, including pollen, ragweed and other allergens, viruses, germs, dust mites, mold spores, pet dander and cigarette smoke. Extremely effective at capaturing influenza virus from indoor air ( based on independent testing). Carbon filter removes odors and captures large airborne particulates. Aera+™ Mode for allergy and cold/flu seasons. Ultra quiet operation. Fan Speed Indicator lets you manually adjust the fan speed setting - low, medium, high or turbo. Filter Change Indicators let you know when it is time to replace your Carbon or True HEPA filter. Built-in handle for easy portability. User-friendly capacitive touch display panel effectively communicates machine performance.