High quality 5 liter portable medical oxygen concentrator generator ready stock Yuwell 8f-5A 8f-5aw 5L Oxygen Machine Medical Portable Oxygen Concentrator Oxygen generator Factory wholesale price Anion and Atomization function:This machine is equipped with ion function, and a "negative" button; the negative ion system can work alone , you can also work simultaneously with the oxygen system;With a separate atomizing outlet, atomizing drug delivery can alleviate the problems of various upper and lower respiratory systems. Multi-layer filter, self-easy to replace:The oxygen system of this product has coarse dust filter, fine dust filter and three bacterial filtration treatment for the input air respectively, finally, the oxygen is fresh and clean after filtering , and the two front layers filter can be replaced without disassembling,the user operate it comfortably.