Oreck Air Purifier Revitalizer with ion HEPA Filtration System Technologies 3-speed with Remote Control and Warranty Air Revitalizer (ANION) - Provides additional air freshness via the release of negative ions, which can also cause dust particles to clump together and fall out of the air passing through the air purifier HEPA Filter - Effectively filters the dust particles, pollen and bacteria above 0.3 microns in the air, thus achieving the effect of purifying the air and keeping the air fresh 3-speed settings with auto timer control for 1, 2 or 4 hours Low - Quietest operation, cleaning the air as effectively buy more slowly than the high setting Medium - Normal use High - Maximum cleaning Includes a remote that controls power, adjust the Air Revitalizer (ANION) feature, Motor speed and Timer (remote requires 2 AAA batteries, included) Energy efficient - consumes as little energy as a common light bulb Backlit LCD display Includes one filter Dimensions: 19.25" H x 14" W x 6" D