HACENOR 1-5 Liters Adjustable Portable Oxygen Concentrator with Battery SK-9000
Richard Traverso
Better than advertised
This unit delivers 3l and weighs just over a pound. They don't mention that there's is duration setting so it will run on battery for 40 minutes. Car or house power runs as good as my large unit. Much quieter. Only problem is the openings on the carry bag do not align well for on/off switch, power in and air out.
Fixable by making openings larger. A good unit. I did a lot of research and for the money you can't go wrong.
HACENOR 3L/min Portable Oxygen Concentrator With Battery HC-30M