Perfect for home,office,and in-vehicle use Specifications:Compact size:easy for carrying and placementTwo Layer filters:PP coarse cotton ... carbon catalyst can remove toluene,xylene,benzene,and other phenols,esters,alcohols, and tsuen gasesPP coarse cotton filters removes dust ... . The filters can be washed and reused.Quick indoor deodorantPerfect for home,office,and in-vehicle useBuilt-in incense box ...