oxygen concentrator OC-S80 8L/min, purity 93+/-3%, Large LCD, ... w/stable purity, CE0123, Free sale Professional manufacturer of oxygen concentrator in Chinaoxygen concentrator OC-S80 8L/min w/timerLarge LCD screenGreat stability ... 40Humidity Range (%)≤80Equipment Class and TypeClass IIaSafety Alarms & FeaturesPower Failure, High Pressure / Low Pressure, Temperature, Current overload or line surge ...