A high-efficiency, HEPA-type air purifier is whisper-quiet and features variable output control to help remove pollutants from the air.What it does: This large-capacity air purifier works in rooms up to 300 square feet and removes up to 99.97% of airborne particles such as mold, pollen, smoke, pet dander, dust mites and other possible allergens.Additional features: It has three speed controls, runs continuously and is whisper-quiet no matter what speed it is set at, which is perfect bedroom humidifier option for a good night's sleep.Includes: Purifier and one filter (HS-1941 replacements are sold separately).Sizing information: 9.25" x 9.25" x 7.5". BPA-free Plastic Imported