Winext portable Car Air Purifier, 3M HEPA type Ionizer, Air cleaner, Ionic air purifier, Car Air Freshener,Ionizer Oxygen Bar with 5V DC Car Adapter First purification: Our Winext Car air purifier use imported 3M company filter (4 in1 pre filters material effectively destroy the influenza virus, bacteria and pollen in the air ; HAF electrostatic filter effectively purified PM2.5, dust, haze in the air) Second purification: Our Winext Car air purifier have 5 Million negative Ions to purify as nature does after a thunderstorm. The ionizer creates negative ions which seek out positively charged particles, such as dust, dander and other allergens and then, once the positive and negative ions are bonded together, they become too heavy to float, and no longer affect the air quality of the surroundings Support car adaptor 12V and Micro USB DC5V input, unit thickness is only 3cm, fashionable design. Improving air quality and removing unwanted smoke, odors, pollen,air propulsion, dust and more, suit for car space or office desk. Whatever you feel or not, the negative ion will keep you a healthy space and improve immunity. We are the manufacture, life time warranty offered of our winext portable air purifier.