Brand New Invacare XPO2 transportable concentrater system complete with extra battery. The system includes AC power provide and DC power provide for car, bag, manual, and additional external battery. The unit weighs rather less than 6lbs and is FAA approved. It comes with the unique box and packing it came in. It used to be opened to take a look at and show for pictures but never used.It retails for $3200. Any questions Email. Thank you for taking a look.