USB air purifier, air purifier, ionic air purifier, air cleaner, air freshener, ionizer, mini air purifier, portable purifier EASTAND USB AIR PURIFIER EP201* Use E-ionic breeze technology, ... variety of odors, create clean, fresh, natural air;*Negative oxygen ions is not only can revove smoke ... economical and practical;*Compactbody, and the USB interface, suitable for any USB port for your convenience.