... cleaner, air freshener, ionizer, mini air purifier, portable purifier EASTAND USB AIR PURIFIER EP201* Use E-ionic breeze technology, produce a ... use of power less than 1W, and without replacing any filter material, only clean and maintain simple body itself, reduce the ... follow-up cost, very economical and practical;*Compactbody, and the USB interface, suitable for any USB port for your convenience.