Eliminates unpleasant odors and fumes from the vehicle's cabin. Chemical-free and no filters to change. Supplies immediate relief and fresh air for driver and passenger safety. It can be used by simply plugging it into the cigarette lighter of your vehicle to instantly purify and freshen the air in your vehicle. This purifier begins functioning immediately after plugging it into the 12V Socket of the vehicle. Once plugged in, experience immediate relief and fresh air for the driver and passenger safety. It helps relieve allergies, hay fever and asthma and eliminate bacteria, pollen and dust. This purifier contains no chemicals used and needs no refills.