Buy Inogen One G4.

Inogen One G4 is noted to be one of the smallest,

lightest and quietest portable oxygen concentrators of today.

As one of the lightest portable oxygen concentrators on the market,

the Inogen One G4 provides its user patients with the mobility they need to maintain their current lifestyle.

Weighing in at less than three pounds, this POC is  perfectly designed to provide your oxygen patients with limitless freedom to go about their daily activities.