Respiration mode: IPPV, SIMV, MANUAL Display: 5.5' SNT screen Waveform: P-t, V-t Tidal Volume: 50～1600ml Respiratory frequency: 1 to 65 BPM I:E ratio: 8:1～1:8 Alarm parameters: High pressure alarm, Low pressure alarm High pressure alarm limit: 20～60cm H2O Low pressure alarm limit: 0～20cm H2O Monitor parameters: Tidal volume, MV, Ppeak, PEEP, respiratory frequency, I:E ratio Safety valve pressure limit: 6 Kpa Good air tightness, high reliability, and minor respiration impedance