... . Air, Oxygen NO2 -3 gas&6 tube flowmeter 3.10.4 TFT color screen Anesthesia Machine- ARIES 2200 Special Feature:Display: 10 ... +/-1Hz110V+/-10%, 60Hz+/-1HzInternal battery: DC12V( over 4 working hours) Anesthesia Ventilator:Respiration mode:IPPV, SIMV, SIGH, MANUAL, STANDBY, DEMOWaveform: P ...