◆ Suitable for all kinds of special machines, on-demand system ◆ multi-axis motor built with independent fan forced cooling to avoid high temperatures ◆ rotary knob easily set fast feed stroke and full stroke ◆ has a timer function, to do for a long time ◆ High-speed continuous cycle of action made push-button switches and special motors have been through rigorous testing, rugged ◆ automated operation, is the best choice for unmanned aircraft and beginners