Inogen, Inc. is a medical technology company. The Company develops, manufactures and markets portable oxygen concentrators used to deliver supplemental long-term oxygen therapy to patients suffering from chronic respiratory conditions. The Company's Inogen One systems concentrate the air around the patient to offer a single source of supplemental oxygen anytime, anywhere with a portable device. Its three portable product offerings, the Inogen One G4, Inogen One G3 and Inogen One G2, at approximately 2.8, 4.8 and 7.0 pounds with a single battery, respectively. Its Inogen One G4, Inogen One G3 and Inogen One G2 are sub-3, sub-5 and sub-10 pound portable oxygen concentrators, respectively. All of its Inogen One systems are equipped with Intelligent Delivery Technology. The Inogen At Home stationary oxygen concentrator allows it to access the non-ambulatory oxygen patient market and serves as a backup to its Inogen One system for ambulatory patients on its rental service.