... : Tidal volume, MV, Ppeak, PEEP, respiratory frequency, I: E ratioSafety valve pressure limit: 6KpaGood air tightness, high reliability and minor respiration ... ~10L/minO2 and N2O Linkage Device: Adjust O2 and N2O in proportion (keep O2 concentration not lower than 25%)Oxygen flush ... gauges, N2O, O2 ARIES 2700 Anesthesa equipment with CE certificate in health