3-stage filtration (pre-filter, activated carbon & Lasko pleated filter) Removes 96% of airborne irritants, including pollen, smoke, pet dander, dust mites, odors, dust & mold 8-hour auto shut-off timer AHAM Verifide - Independently tested. Consumer trusted. The Blue Plug™ trusted safety fuse technology & ETL listed Features fresh air ionizer mode Easy to clean and maintain with removable grill 3 air purifying fan speeds ARB Certified to comply with federal ozone emissions limits