The Aerus Lux Guardian Angel HEPA Air Purifier F179A is a portable air purifier that has been tested to be in working condition. With its sleek black design featuring silver trim, this air purifier stands out in any room. At 18 inches in height, it is compact and easy to move around for maximum coverage in improving indoor air quality. Built by the trusted brand Aerus, this HEPA air purifier effectively filters out impurities and allergens to create a healthier environment in your home or office.