This model, made by Inogen, in no longer on sale. See Inogen’s product line for the ones that are available. 

If you’re new to oxygen concentrators and not sure which product is right for you, have a look at the homepage for more information.

Inogen One G2 Portable Concentrator

$$$

9.3

Noise

10.0/10

Price

8.5/10

Battery Life

9.0/10

Weight

9.5/10