POWERTEC AF1044 3SPD Air Filtration System, 556/702/1044-CFM Powerful, quiet, efficient, and potent air filtration system Easy to replace filter; no tools required; Outer filter: 5 micron; Inner filter: 1 micron 3 Air flows: 556/702/1044 Infrared remote control system; 3 timer setting: 1hr/2hr/4hr Includes remote control and mounting hardware