Solair Room, Car and Desktop Portable 5 Stage Air Purifier with Home and Car Adapters Compact, design and quite operation allows you to use this filtration system close to where you sleep, drive and work to provide the maximum benefit. Coverage Area: Approx. 170 Sq. Feet ( room size = 12 x 15 ) No batteries required, it simply plugs into your wall outlet or cigarette lighter socket to power itself. High and Low fan speeds. Refillable fragrance compartment allows you to add your favorite essential oil or other scents to your car or room.