Inogen One® G4® Portable Oxygen Concentrator and Inogen At Home® Stationary Oxygen Concentrator Bundle Total G4 Batteries Included in Your Package::1 Large Batt. (Up to 5 Hrs) - Replaces Small Batt. Auto Oxygen Delivery - automatically

Auto Oxygen Delivery - automatically delivers oxygen when a breath is not detected

The output filter must always be in place while you use your Inogen

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Integrated filter keeps the concentrator clear of external debris

Inogen One® G4® Portable Oxygen Concentrator and Inogen At Home® Stationary Oxygen Concentrator Bundle Total G4 Batteries Included in Your Package::1 Large Batt. (Up to 5 Hrs) - Replaces Small Batt. Auto Oxygen Delivery - automaticallyPortable Inogen One G4 with Oxygen Flow 1 to 3 and Travel Inogen GS 100 with Travel Case "The two travel perfectly together in style." Travel with portability & constant flow! Day Time Carry Oxygen: The Inogen One G4 "WEAR IT" The Inogen One G4 is the smallest Inogen ever made. Hand carry, shoulder carry, or waist carry for true daytime portability and flexibility. Weighs just 2. 8 pounds including the battery Measures 5. 9 inches in length, 2. 6