Features : - A3967 Microstepping Driver - MS1 and MS2 pins broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth) - Compatible with 4, 6, and 8 wire stepper motors of any voltage - Adjustable current control from 150mA/phase to 700mA/phase - Power supply range from 6V to 30V. The higher the voltage, the higher the torque at high speeds