... large dust particles HEPA filter---Purification efficiency is 99.97% of 0.3um paricles. Absorb particulate such as ... carbon filter---Absorbs harmful gases and malodors in the air like formaldehyde,benzene,cigarette smoke,food smells,and other ... radical,photocatalytic oxidation can effectively disinfect,deodorize and purify air.Smoke and dust sensor---Automatic perceived indoor dust, cigarettes ...