Brand: Inogen

Product Code: IS-400-3Y4

Availability: In stock



The Inogen One G4 is a lightweight and compact portable oxygen concentrator that is designed to help individuals with breathing difficulties get the oxygen they need while on the go. It weighs just 2.8 pounds and measures 5.91 inches in length, 2.68 inches in width, and 7.2 inches in height, making it one of the smallest and lightest oxygen concentrators available.

Despite its small size, the Inogen One G4 is capable of delivering pulse only oxygen flow of up to 3 liters per minute, making it suitable for a wide range of oxygen therapy patients. It can be used with a variety of oxygen delivery devices, including nasal cannulas, and features a user-friendly interface with easy-to-read digital displays and intuitive controls.

The device operates using advanced pulse dose technology that ensures oxygen is delivered only when the patient inhales, conserving oxygen and extending the life of the battery. Speaking of which, the Inogen One G4 has an impressive battery life, lasting up to 2.7 hours on a single charge with the standard battery, or up to 5 hours with the optional double battery.

Overall, the Inogen One G4 is an excellent choice for those who require oxygen therapy but don't want to be limited by bulky and heavy equipment. Its small size, ease of use, and impressive battery life make it ideal for travel and other activities where mobility is essential.



  • Lightweight and compact design weighing just 2.8 pounds
  • Rechargeable battery with up to 2.7 hours of use on a single charge
  • Can be powered by AC or DC power source for extended use
  • Intelligent Delivery Technology for efficient and effective oxygen delivery
  • Pulse dose delivery method to conserve oxygen and extend battery life
  • Quiet operation with a noise level of just 40 decibels
  • Easy-to-use interface and intuitive controls
  • Ideal for use at home or on the go, including travel
  • Additional batteries available for longer use away from a power source
  • Reliable and effective source of oxygen therapy for those with respiratory conditions


Return on Warranty Issues Only



3.3 lbs*


5.91 × 2.68 × 7.2 in (Height includes single battery)

Oxygen Flow

Intelligent Delivery Technology®

Three flow settings from 1-3

Power Settings

AC Power Supply 100-240V, 50-60Hz

(auto sensing to allow worldwide use)

DC Power: for mobile use in car/airplane

Duration: up to 2.72.7hours @ flow setting 1 - (Using Single Battery)

Noise Level

40 dBA @ flow setting 2


Concentrator: 3 Years 

Concentrator Sieve Beds and Accessories: 1 year

 What's in the Box:

  • Inogen One G4 oxygen concentrator unit
  • Single rechargeable lithium-ion battery
  • AC power adapter
  • DC power cable
  • Carrying bag with shoulder strap
  • User manual