... 1, 2:3, 1:2, 1:3Displayhigh luminance LED displayventilator compliance≤4mL/100PaSafety pressure in the airway system ... volumeRespiratory rateAlarmsUpper airway pressure limit, Lower airway pressure limit, Power failure, Silence time for alarm, Alarm for oxygen ... , Safety valve, N2O cut-off with oxygen failure.Photo 1 Piece/Pieces Portable Anesthesia machine with ventilator, High quality equipment