QUIETPURE Auto Portable Air Purifier with HEPA Filter Compact, lightweight design fits into car cup holder and plugs into auto cigarette port Utilizes true HEPA filtration, carbon filtration, and a negative ionizer for optimal air cleaning Removes microscopic airborne particles such as allergens, dust and bacteria. Destroys common airborne viruses. Offers near silent operation Comes with two additional free HEPA filters for 1 year's worth of HEPA filtration