Cdycam 4 x 12V Mini Auto Car Fresh Air Ionic Purifier Oxygen Bar Ozone Ionizer Cleaner Small and exqusite design, it is an excellent product for gift. Plug and play It is applicable for all cars which comes with 12V power supply , very simple to use , just insert this one into the car smoke igniter. Has the best medicine function,and can effectively reduces the cough,sneezes,asthma's incidence of a disease.