Light Seller&reg; Mini Fresh Air Ionic Purifier/ Oxygen Bar/ Ozone Ionizer Cleaner for Passenger Cars (RH-FLZ-RD) This product emits millions of anions which can rapidly eliminate smoke, dust, bad odor and smell, to purify the air inside your car. Simply ply into cigarette lighter receptacle, the blue light indicate that this ionizer is operating. To the vehicles which when you turn off the engines but the power of cigarette lighters are still on, it is recommended to remove the unit from the lighter socket each time when you turn off the vehicles. Scientific research shows that this product can effectively reduces cough, sneezes, and asthma's incidence of disease.