... High performace 2.low power consumption 3.High microstep,high torque 4.low noise,broad voltae range, Characteristics:1.DC power input type ... direction input, voltage level touched off,high towards, low reverse7,REST+,REST-: motor ... 2, Half current automatically: if control machine not send out signal in half second ... motor drivers using new 32-bit DSP with high performance, high torque, and low noise