Tidal volume(Manual Mode): 10-2000ml Gas pressure:0.25~0.65Mpa Flow meter: O2 two tube:0.1~10L/M APL valve:0.5~6.0Kpa O2 Flush:25~75Lmin l:E:As the doctor operation BPM:As the doctor operation Monitoring:Airway pressure, respiratory mode. Three gauges:Two for 02,one for airway pressure Optional:trolley USD180.00