This oxygen concentrator provides a maximum continuous flow of 5 liters per minute with an oxygen purity of at least 90% and at most 95%. This makes the oxygen concentrator suitable for people who suffer from COPD, cardiovascular diseases and other lung diseases for which extra oxygen is desirable and for which a maximum of 5 liters per minute of oxygen is required. The use of the oxygen concentrator can improve your self-effort and fatigue, which can contribute to a better quality of life. The â€œnormalâ€ air you breathe contains approximately 21% oxygen. This percentage can be increased by using an oxygen concentrator, so that you get more oxygen. This oxygen concentrator has the capacity to produce up to 95% oxygen purity. The supply of oxygen is continuously adjustable. This means that you can use the maximum capacity, but not have to use it, you can easily set this to your own needs.