An award winning Swedish design, the Blueair 650E outperforms other air purifiers in its class with the world's highest Clean Air Delivery Rate (CADR). Independently tested by the Association of Home Appliance Manufacturers (AHAM), the Blueair 650E is certified with a CADR of 450 cubic feet per minute at a superior 5 air changes an hour. Blueair's HEPASilent® technology filters out 99.97% of airborne particles down to 0.1 microns in size, capturing particles such as pollen, dust, and pet dander. Blueair achieves highly efficient filtration though a combination of mechanical and electrostatic technology, a combination more successful than either mechanical or electrostatic filtration alone. Featuring SurroundAirTM technology, the Blueair 650E takes in air through an area six times the size of the average air purifier for a higher, more efficient airflow. Never worry about indoor air quality again with the E-Series AUTO setting. Using an optic laser and ceramic sensor the Blueair 650E air purifier tests your indoor air and automatically adjusts speed to keep you breathing the cleanest air possible. Designed in Sweden and manufactured in the United States, the 650E is equipped with casters and includes a remote control, so your air purifier can be moved where you want it and controlled from anywhere in the room. Intended for use with standard U.S. Outlet: 110/120 Volt AC 60 Hz.