Inogen One G5 Portable Oxygen Concentrator Small and 8 represents the highest

and 8 represents the highest

-Entrainment valve automatically opens if pressure drops to 3cm or lower to allow breathing of room air

Cushion - Minimal Contact & Multiple Sizes

It is located on the backside of the top of the concentrator

Inogen One G5 Portable Oxygen Concentrator Small and 8 represents the highestProduct Features: Designed for full time usage; 24 7 Single battery lasts up to 6 hours 30 minutes and double battery can go up to 9 hours Inogen Connect Mobile Application FAA Approved Quiet operation at only 38 decibels Product Specifications: Pulse Dose 4. 7 Pounds (with Single Battery) Intelligent Oxygen Delivery Technology Up to 6. 5 Hour Battery Life (single Battery, Setting of 2) Includes the G5 unit, single battery, AC power supply, DC power