... consumption 3.High microstep,high torque 4.low noise,broad voltae range, Characteristics:1.DC power input ... direction input, voltage level touched off,high towards, low reverse7,REST+,REST-: motor free The interface seethe right ... long time. 2, Half current automatically: if control machine not send out signal in half second, driver enter ... bit DSP with high performance, high torque, and low noise