Operates quietly to help remove up to 99% of airborne particles such as pollen, dust, mold spores pet dander and smoke, providing relief from irritants in the air. HEPA-type permanent filter captures particles as small as 2 microns so you can breathe comfortably. Service light indicator let’s you know when the filter needs to be cleaned. Product information is provided by the product vendor. This content is a summary for informational purposes only and does not have all possible information about this product. It should not be used as a substitute for advice from health care professionals, as this information alone does not assure that this product is safe, effective, or appropriate for you. For more detailed information on this product, including reported and possible side effects and contraindications, refer to the manufacturer's monograph, or speak with a health care provider.