Walletz4u Oxygen Concentrator is a portable, sleek, compact, reliable uninterrupted working system, noise-free operation, low maintenance, easy to operate medical device for healthcare professionals and homecare essential for patients. Oxygen concentrator is a device that concentrates the oxygen from a gas supply (typically ambient air) by selectively removing nitrogen to supply an oxygen-enriched product gas stream. Walletz4u Oxygen Concentrator reduces the healthcare operating cost unlike refilling the cylinder. We have 3 capacity variants 1L, 5L and 10L.