Portable oxygen concentrator: Portable oxygen concentrator (or POC) is a portable device used to provide oxygen therapy to patients. It is in fact a smaller version of a stationary home oxygen concentrator, but is smaller in size and more mobile. The portable oxygen concentrator makes it easy for patients to travel freely as it is small and can be used in e.g. cars, boats and planes. The portable concentrators plug directly into a regular house outlet for charging at home or hotel. The also come with a power adapter that can be plugged into a vehicle DC adapter. Beside this they can operate from the battery power. Portable oxygen concentrator: Translated in Italian as Ossigeno Portatile.