Operating System : Time Cycle / Rapid Pressure Swing Oxygen Concentrator : 93% ± 3% Delivery Rate : 0-5 L/Min Outlet Pressure : 0.05-0.08 Mpa Operating Temperature : 10-40 deg Humidity Range : < 80% Sound Level : < 40dB Alarm : Power Failure. Low purity. High-low Pressure. Low Oxygen Concentration.Temperature. Power Overload. Line surge Shutdown Thermal Switch 40 PSI pressure Relief Valve Weight: 25 Kg OPTIONAL: Built-in 26 Micro SD Card & Clinical Software