HONGEN 1L/min Membrane Protable Oxygen Generator HONGEN 1L/min Membrane Protable Oxygen Generator was designed in the way of portability with the reduction of weight to 870g, which highly reduced the weight and space consumption of the user. HONGEN 1L/min Membrane Protable Oxygen Generator was integrated with build-in battery which allow it to last up to 4 hours. The unique and simple portable design allow easier usage and portability for the user, which are best suitable for outdoor usage and travellers. Specification: 1L/min membrane oxygen generator Technical parameters: ambient humidity: 5% RH ambient temperature: -30 ~+40 Technical parameters: operating voltage: DC12 rated power: 10W main engine weight: 870g working noise: 42dB(A) oxygen concentration: 90 + 3oxygen flow rate: 1(N)L/min oxygen production principle:MAS membrane air separation