Meet the Creliver 1-2L/min Oxygen Concentrator: a portable oxygen machine with a LED screen and infrared remote control. It has 80% oxygen concentration and 6-level filtration. It weighs only 1.88kg, measuring 210mm x 295mm x 75mm, so you can take it with you anywhere.
You can use this oxygen machine in your car (12V) or at home. More information is available here.