... ,can promote the blood circulation and the metabolism; Oxygen Concentrator,Oxygen Concentrators,oxygen generatorOxygen Concentrator ZY003's Description: IntroductionMajor usage:Apply to ... should be≤ 80%.3, The oxygen concentrator is not capable for being used in excessive moist.4, The machine ... get close to the users. The machine should be used where there are no objects with high temperature, sparks ...