Worldwide markets are poised to achieve continuing growth as the aging population worldwide needs homecare oxygen treatment. Older people develop COPD and other respiratory conditions where oxygen is able to improve the quality of the life in a dramatic manner. Portable devices have become affordable and support a mobile lifestyle even while on oxygen. There has been a quantum improvement in the portable oxygen concentrator technology. Less weight, more power are the characteristics of the new portable units that begin to rival the larger home units. The huge jump in technology is illustrated by the effectiveness of the Inogen device.