Matching up with the exact requirements of customers, we are involved in presenting wide array of AirSep Oxygen Concentrator. Other Information: AirSep Freestyle 3 is a very capable portable AirSep oxygen concentrator that works on uniquely efficient flexible pulse-flow delivery system. It is the most compact and lightweight portable oxygen concentrator that delivers therapeutic oxygen up to a 3-setting (equivalent to 3 LPM). Features: Defect free Long service life Easy maintenance