The material of this portable anion on-board air purifier: ABS+Steel+ natural rubber. HEPA filtration + activated carbon filtration. 3 colors: green, black, Carbon fiber color. Have ISO, CE, FCC, ROSH, TUV quality inspection reports. It can disinfect the air by removing the stink, smoke, dust, and PM2.5 pollutants, benzene, and formaldehyde, as well as killing harmful bacteria and viruses to make the air healthier to breathe. Add your logo to create a valuable branded promotion.