HEPA Car Air Purifiers – Suitable for car, bedroom, office, desktop, etc. Filters 99.9% of dust, particles as small as 0.3 microns and PM2.5. Gives you an air-fresh environment whether you’re driving, sleeping or working. Upgraded Design – Thanks to the elaborated design of 4-layer filters and anion generator, you can breathing fresh and clean air filtered by this high-performance air purifier. Primary Filter, EPA Filter, Activated Carbon Filter and HEPA Filter work together to clean the air while the anion generator releases 4 million anions per second to make the air fresh. One Button Easily Switches 3 Modes – Just press the button, you can easily change the air purifying mode to meet your different needs. Sleep Mode, Regular Mode, Ultra-clean Mode, adjusts the purification from weak to strong, meets various use in different situations. USB Port & Portable Size – By the attached USB cable, this air purifier can be easily connected to different power sources such as computer and car.