... oxygen generator: 40% to 70% steady oxygen outlet,easy to operate,: 70W can be used in vehicle, portable oxygen ... oxygen generator: 40% to 70% steady oxygen outlet,easy to operate,: 70W can be used in vehicle,oxygen ... oxygen generator: 40% to 70% table oxygen outlet,easy to operate,:80W can be used in car, with ... . Air flow volume: 1 to 3L/min Oxygen concentration: 0.5L 80%±3% 1L 70%±3% 2L 60%±3% 3L ...