EXTENDED RUN TIME: Trimmer 2-Speed Setting lets you choose more power or more runtime TURN TO EDGE: Trimmer can be used for both edging and trimming AUTOMATIC LINE ADVANCE: Trimmer feeds 0.065 inch line automatically with no bumping required Blower Brushless motor & axial fan design delivers maximum efficiency at 350 CFM and 100 mph Blower Variable speed trigger choose between more power or more runtime