... purifier; 2.Remove smoke,dust and bacteria; 3.Bring you clean,fresh,natural air; 4.Low-power. USB personal air Purifier ... oxygen, Neutralizing and decomposing various odors to create clean, fresh, natural air;Negative oxygen ions is not only able to ... inhibit mildew, to promote metabolism, enhance immunity, but also can effectively decompose benzene, formaldehyde, ammonia and other harmful substances; ...