This SimPure Mini Car Air Purifier is a portable solution that features a 4-stage filtration system including a true HEPA filter, activated carbon filter, anti-bacterial filter, and pre-filter. It effectively removes 99.97% of dust, pollen, smoke, odor, pet dander, and filters particles as small as 0.1 microns. With a powerful third-generation negative ion technology, it releases 30 million pcs/cm³ of pure negative ions per second that effectively remove PM2.5~PM0.01 deadly micro particles. It also features a dual fan system, aromatherapy diffuser function, and easy installation compatible with 99% of cars. Noise level is lower than 30 dB and it comes with a replacement filter for convenience.