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. They're reusable and last as

They're reusable and last as long as the cannula they're paired with — replace when worn or with each new cannula

UltraSense® Technology

Integrated filter keeps the concentrator clear of external debris

If you prefer a backpack-style carrier

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

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. They're reusable and last asPortable 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