air refresher for clean / fresh air in room. - air filtering system, not spraying. - supplying clean/fresh air in closed place, emitting out anion/natural infrared rays by charcoal filter. - timer function by minute unit 1st 20 seconds/2nd 40 seconds/ 3rd 60 seconds. - improving the demerits of mechanical spraying system with low noise. - electrical power by adapter : no battery. - recommended fragrance : charcoal filter/general fragrance/aroma terafic functional fragrance. Pls visit our homepage to get more information. Best Regards Harold Huh
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