Occupying as little desktop surface as a postcard, this compact air purifier from the manufacturer of our Best Air Purifier creates a personal clean air zone in your office, home, or hotel room. Its patented design houses an ionizer and a whisper-quiet 12-volt fan in a 6 1/4" square brushed aluminum dock that draws air through the turquoise HEPA filter, trapping dust, smoke, pollen, and other impurities without emitting ozone. The purifier covers a 29' sq. area with a Clean Air Delivery Rate (CADR) of 20 for dust, 18 for smoke, and 25 for pollen, while requiring 85% less energy than comparable models. Overall, the unit is smaller than a shoebox, allowing you to pack it easily in a briefcase or luggage for travel. The filter lasts up to six months. Plugs into AC. 13" H x 6 1/4" W x 4" D. (1 3/4 lbs.)