... 1.High performace,low power consumption 2.High microstep,high torque 3.broad voltae range 4.wide output current range:0. ... 24V~50VDC2.Output current:1.3A-4.5A3.Mircostepping:1(1.8º),1/2,1/4,1/8,1/16,1/ ... ambient temperature is high or working current over 2.7A, fix the module on big metal shell , or use axle ... jump5,installation dimension Stepping motor driver,1.3A-4.5A,high quality and reasonable price