... easy to operate, applicable to basic hospitals 3. high precision flowmeters 4. compact design ANESTHESIA VENTILATOR Driven ... rateAlarmsUpper airway pressure limit, Lower airway pressure limit, Power failure, Silence time for alarm, Alarm for oxygen ... valve, Safety valve, N2O cut-off with oxygen failure.Photo 1 Piece/Pieces Portable Anesthesia machine with ventilator, High quality equipment