... High microstep,high torque 4.low noise,broad voltae range, Characteristics:1.DC power input type:24V~80V2.Output current:2 ... direction input, voltage level touched off,high towards, low reverse7,REST+,REST-: motor free The interface seethe right ... module on big metal shell , or use axle flows fan dispels the heat, to make the module run reliably ... bit DSP with high performance, high torque, and low noise