Features Scope of application: Respiratory first aid and respiratory therapy for patients weight over 5 kilograms. Gas source pressure:O2:0.32MPa~0.6MMPa Respiratory control mode: CMV Respiratory rate: 5bpm-40bpm Ventilation flow rate: 0-20L/min Inhalation to respiration ratio: 1:2 Output gas oxygen concentration: air mixture (50% -80%) without air mixture (90%-100%) AC power: After power failure, DC power supply shall continue for no less than 8 hours. Optional: trolley