... 10.4 "color TFT screen displayDouble-ended differential pressure flow sensor, machine control or manual mode can be real-time ... ) on the pressure, the lower limit of suffocation, the oxygen concentration.Breathing ring functionCan be closed, half-closed, half-open ... 0.55MPaAir: 0.27 ~ 0.55MPaPower supply: 220V ± 10%, 50Hz ± 1%Flowmeter:Oxygen, nitrous oxide, air six tube flowmeter (0 ~ 10L/min ...