InSight Series Air Purifier delivers powerful HEPA filtration in a compact tower design that displays device setting information from a distance. Air Quality Indicator is powered by a VOC sensor that will constantly monitor room air quality while providing real-time, easy-to-understand, color-coded feedback via the clear Insight Display Panel. When set to Automatic Cleaning mode, this HEPA air purifier uses the air quality reading to automatically adjust to the optimal cleaning level. The easy-to-read, color-coded feedback on the clear Insight Display Panel will illuminate which cleaning level (4 available) you've selected. InSight HEPA Compact Tower Air Purifier uses certified HEPA filters to help capture up to 99.97% of microscopic allergens and particles. This portable air purifier can help capture airborne particles such as dust, smoke, pollen, pet dander and mold spores in medium rooms (4.8 x air changes per hour in a 100 sq. ft.). Carbon-activated pre-filter helps trap larger particles while helping reduce odors and VOCs (volatile organic compounds).