タイトルまたは説明

1st stage: HEPA filter Remove airborne allergen, such as acarid, pollen, germs, second-hand smoke, dust, etc  
2nd  Stage : carbon filter Remove  the odor and pollution.can filter the secondhand smoke, harmful gases and peculiar smell
3rd  stage: Photo catalyst   Remove formaldehyde, benzene ,ammonia ,TVOC etc. long-term effective.
4th stage: UV lamp kills microbes, such as viruses
5th stage: Anion generator disperses charged ions into the air to make the air fresher.