... odorous substances in the air, tiny particles, harmful gas, formaldehyde, benzene, amine gas, etc..3. Hospital grade HEPA filter technologyAdopt the ... And rapidaly decompose formaldehyde, benzene, ammonia and other harmful gas molecules, kill all kinds of baterias.5. UV lamp ... , formaldehyde, benzene, toluene, dimethylbenzene, TVOC, and other Automobile exhaust gas, like CO, CO2, NOx,etc