Oxygen Concentrator 1-7L/min Adjustable , 24h Continuous Flow ,90% Purity ,Low Noise ≤45dB

The concentrator is much smaller than most oxygen concentrators, so less bulk to have to deal with. Despite what the manual says, it doesn't require an air filter (or it's built in ... never really got an answer). The customer service is remarkably poor. They did get back to me, but barely answered any of my questions. (Such as the difference between the oxygen outlet & the nebulizer port. Where is the oxygen absorber that needs cleaning. Etc.)

Very good equipment,super compact and silence,i recomend for every one,i tested the liter flow and match 100%.

It is easy to travel with and I can get over two hours per trip.

I bought for my wife who has multiple diseases plus plural effusion. She goes breathless by walking even to bathroom. This machine works like a charm for her. Very rugged and strong, easy to use with remote control. It saved her life and hospital trips many times. We are very happy with product. Good buy.

I haven't had time to even use it yet . Was wondering if this could be used for long term or short term ?