LEMONBEST Upgraded 12V Car Air Purifier Ionizer Air cleaner Ionic air purifier Car Air Freshener Cigarette Smoke Smell Eliminator (Silver) Release large amount of negative ions that can effectively remove dust, dander, bacteria, pollen, mould, smoke and PM2.5, chemical vapours, and other allergens in the air. Fashionable unique design car air purifier with 4.8 million pcs/cm3. negative ion. Ozone concentration: 3 mg/h. Plug the device into the car cigarette lighter or adapter, the Blue indication light will be on when the device is working, and it will work continuously until it is unplugged. Ozone concentration  0.05ppm, suitable using space: &lt;15m ASSURANCE: We are CE (Conformite Europeene), RoHS (Restriction of Hazardous Substances) and FCC ( Federal Communications Commission) - CERTIFIED and APPROVED. It is a healthy product!