RE-CERTIFIED Inogen One G4 Portable Oxygen Concentrator

RE-CERTIFIED: What is in the box? Portable Oxygen Concentrator AC Power Supply DC Power Supply Rechargeable Ion Lithium Battery Carrying Case Shoulder Strap 3 cannulas LIFETIME TECH SUPPORT 24/7 Overview: Introducing the smallest portable oxygen concentrator from the most popular brand, Inogen. The Inogen One G4 is capable of providing oxygen delivery in an unbelievable small and quiet package. With flow settings from 1-3, the Inogen One G4 is designed to increase independence for most users 24/7. It can be charged at home or on the go - giving you the freedom you deserve. The Inogen One G4 provides you with 3 separate oxygen flow settings. It also includes Inogen’s Intelligent Delivery technology, which sets it apart from the competition. This innovative system rapidly detects a breath and delivers oxygen in the first 400 milliseconds. This is critical because this period is when the most gas exchange occurs in the lungs. Delivering oxygen at the start of a breath ensures that the oxy