Inogen G4 is made in North America. It is the most popular and most portable oxygen concentrator. Inogen website says it is "library quiet", FAA approved for airline travel, 2.8 pounds including battery. It is almost exactly the dimensions of my copy of Norton's Anthology of English Literature - 3rd edition (softcover), and approximately the same weight. It has 4 flow settings. It has very positive reviews; even better than Norton's. Because there are so many of them (the Inogen), it is easy to find extra batteries and accessories.

I was sick and thought I would need it. I got better (Yay!!). Now I need to recover some of the money I spent on it earlier this year and pay down my credit card. I am sympathetic to cash concerns and might consider items for partial trade.

As the pictures show, this one is used less than 100 hours. It comes with carrying case and shoulder strap, two batteries, charger and power cord, 7 foot oxygen hose and nasal cannula. The hose and cannula are still in the original, sealed plastic bag. None of the items, including the cannula and the Norton's, have ever been up my nose. I have linked the manufacturer's website and the user's manual below. I would be willing to print off a hard copy of the user's manual if desired. It is quite a bit shorter than the anthology.

The coffee cup in the picture is not for sale. It is included for scale and shows that the Inogen G4 is quite small and could easily fit in a small handbag or discretely under your jacket or sweater. A slightly larger handbag would be recommended if you also want to carry the Norton's.

Norton's not included, but if you pay full asking price you may have my wife's trio of Nora Roberts novels (hardcover).
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