... to 40000 stepsPulse Input Frequency up to 200KHzDrive Current from 0.1A~4.0AVoltage ranges: DC24-80V (the best input DC70V ) ... Dimentions:45*136*92(mm) Weight:0.5kgError Protection: overheated, over-current, low-voltageSpecial Control CircuitOptically Isolated ... , Embroidery machine, Medical equipment, Metallurgical furnace, Semiconductor equipment etc. micro stepping motor drive