1L-3L/m SuperLightweight High Purity Oxygen Concentrator with Total 5 Hours Battery Power I Model XM-868N

Product Description This 1L-3L/m oxygen concentrator is a lightweight device weighing 4lbs, gives a high oxygen purity of 90%-93% at 1L/m, 75% at 2L, and 60% at 3L. It comes with a combined 5 hours battery power and works 24 hours continuously to give 1L-3L  continuous oxygen flow  Continuous flow: Gives an adjustable oxygen flow of 1L-3L/minute with oxygen concentration ≥ 90%. at 1L, 70% oxygen concentration at 2L and  50% oxygen concentration at 3L. Lightweight, comes with a carry bag and very easy to operate. Great for outdoor activities such as mountain climbing, golfing, walking, doctor's visits etc.  Comes with built in battery and external battery. The internal battery lasts 2 hours while the external battery lasts 3 hours giving you a combined battery power of 5 hours.   Concentrates oxygen from Air using a 6 grade filtration system to yield 90% pure oxygen at 1L, 70% pure oxygen at 2L and 50% pure oxygen at 3L The machine comes with the complete accessories including the ex