DM556 2-phase Digital Stepper Motor Driver 42/57/86 Stepper Motor Driver For CNC Features: Extra smooth movement Low drive & motor heating Step & direction or CW/CCW control DSP-based stepper control technology Automatic motor identification and self configurationSpecifications: Input voltage:DC20-50V Maximum frequency:200KHz Output current:7 selections of 0.50-5.60A via DIP switches;or any value of 0.1-11. 5.60A via software configuration Size: 11.7*8.5cm/4.61*3.35inch Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Contents: 1 x DM556 stepper motor driver