1. Pneumatically driven electronically controlled system 2. Built-in ventilator, 5.4” LCD display screen 3. With 1 patient circuit for adult (Option: patient circuit for children). 4. 4-tube flowmeters, O2 & N2O ;0.1 L/Min ~ 10L/Min; 5. 1 or 2 Vaporizers: Enflurane/ Isoflurane/ Sevoflurane/ Halothane 6. Ptr: -10~10 hPa; 7. Respiration Mode: A/C, IPPV, SIPPV, IMV, SIMV, MANUAL 8. Tidal Volume: 50~1500mL; 9. Respiration Frequency: 1~99bpm; 10. I/E Ratio: 4:1~1:10