Introducing the next innovation to portable oxygen delivery: the Inogen One G4, capable of full 24/7 oxygen delivery in an unbelievably small package! Offering 1-3 flow settings, the Inogen One G4 is one of the smallest, lightest and quietest units available to the oxygen user today.With the Inogen One you can jump in the car to run errands, take a weekend trip to see family, or even take it on vacation! The Inogen One G4 is one solution for oxygen at home, away, and for travel, 24/7. It's oxygen therapy on your terms.The Inogen One G4 is proudly Made in America.