[RAHAB MEDICAL SUPPLY] VARON 5L/min Pulse Flow Portable Oxygen Concentrator NT-01*5Features: This portable oxygen concentrator provides an adjustable oxygen pulse flow of 5 Liters per minute and supplies a highly efficient oxygen concentration of 93%3%. This oxygen machine is relatively compact and ideal for everyday use at home, outside, or in the car, and it is effective in any setting. This o2 concentrator adopts low noise technology, you can also use it in a quiet place like a church without disturbing others. The 5 liter