Flowrate: 0-4LPM                                    Purity: 95% at 2LPM                           93+-3%     at 5LPM                                       Sound level: less than 48dB                    Outlet pressure:0.03-0.06Mpa                        Alarm: power failure alarm, pressure alarm                                                          Timer: Available                                      Storage box: Available                                             Power supply: 220V/50Hz ; 450W                                   Net weight: 22kg                           Alternative:                                                  * low purity indication;                          *Temp. alarm;                                  *nebulizer;                                                                                       *Single flow;