... current:1.3A-4.5A3.Mircostepping:1(1.8º),1/2,1/4,1/8,1/16,1/32,1/64,1/128,1/2561/5,1/10,1/25,1/50,1/125,1/2504 ... for a long time.2, Half current automatically: if control machine not send out signal in half second, driver enter half ... current;1=half current4,Pulse choice:In the driver has a jump5,installation dimension Stepping motor driver,1.3A-4.5A,high quality and reasonable price