No Maintenance Cost, No Filter Replacement. 2 Qty of PM 10 Washable Filters (Reusable). Fast Deodorization, Quiet Operation. Tiny Dust & 3 Pollen Collections.Twin Air Suction, Supports USB Connection. PM 10 Filter Collects Tiny Dust & Pollen. 2-Port USB Car Adaptor, Dust Catch Filter, Quickly Removes Bad Smell. Change the Atmosphere in Your Car. Fresh, Natural, Clean Air Wherever You Go. Plasmacluster is the only technology that can purify not only the air but alos the surface. Therefore, the foul smell that is trapped in the cushions, ceiling, or even the floor mats can be eliminated with Plasmacluster.