1 Piece New USB Apple Air Purifier Air Cleaner Ionizer Pc Air Fresheners Anionic Air Purifier Laptops USB Oxygen 1.This unit could be well used by connecting it to the computer with USB line 2.iO2 Photo-Catalyst, activated carbon filter for your option 3.Give out floral fragrances to make you refreshed and relaxed 4.Adsorb harmful gas and smoke in the office 5.Color: random