Automatic timing flushing set;water lack low pressured protecter;work pressure set control;reserve RO full waterline machine stop;machine motor protect set;pre-treatment system with regeneration-stop set;automatic control operation; water quality control system with super quality indicating lights;reflux flow adjustment set, adjust pump outlet water; washing RO clean agent circulation in/out port for convenient washing;Up 6000 gallons all control in RO control box.