Car air purifier 12V negative ion air purification dust smoke PM2.5 eliminator car home officeFeatures: The strongest car interior accessory releases 3. 8 million negative ions per cm3 . Efficiently remove the smoke, dust, and PM2. 5 pollutants in the air. Car air purifier produces negative ions that actually improve the air quality by destroying odor causing particulates from the air, rather than simply covering up the smells like perfume. With a measurable and controllable quantity of negative oxygen ions, this compact unit destroys bad odor