This is a FAA approved portable oxygen concentrator meaning you can travel on the plane with two or more person's above 18000ft. ,it weighs 4.7lbs and functions perfectly. Low hours, very light and dependable, comes with long lasting battery, wall charger, car charger ready for use, 6 settings, Inogen One G5 is one of the lightest portable oxygen concentrator on the market today. allowing patients to travel where ever they want.