1,Personal guard to your health 2,To freshen air ,eliminate odors,smoke,dust 3,Portable / Easy to carry 4,DC 3V 0 ... .11W IntroductionSY2083 portable air purifier uses the electronic theory to produce the negative ... upper respiratory tract inflammation, bronchial asthma, atrophic rhinitis, and stomatitis* Portable, easy to carry.Adaptation range*Trains, airplanes, ships, cars*Schools ...