Will you be traveling on an airplane and can't figure out how the regulations work with oxygen? Leave the tanks at home. Use this Inogen portable concentrator instead. It meets all FAA regulations and relieves you of the heavy burden associated with transporting oxygen tanks letting you have more time to relax.
Extra batteries also available for rental.
(L x W x H) 8.75" x 3.0" x 8.25"
Flow Settings: 1-5
Single Battery up to 4.5 hours, Double Battery up to 9 hours
39 dBA (on setting 2)