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A product review of the Inogen One G4 portable oxygen concentrator by Sean from the Oxygen Concentrator Store.
At a weight of only 2.8 pounds with a single battery, the Inogen One G4 is a favorite among oxygen users who want to maintain an active lifestyle. The Inogen One G4 is a powerful portable oxygen concentrator in a small design about half the size of the Inogen One G3. The Inogen One G4 features pulse dose settings of 1-3 and has a battery life of 2.15 hours with the small battery on a setting of 2.
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