Features: There are six different step resolutions: full-step, half-step, 1/4-step, 1/8-step, 1/16-step, and 1/32-step. Over-temperature thermal shutdown, over-current shutdown, and under-voltage lockout. 4-layer, 2 oz copper Print Circuit Board for improved heat dissipation. Adjustable current control lets you set the maximum current output with a potentiometer, which lets you use voltages above your stepper motors rated voltage to achieve higher step rates. Intelligent chopping control that automatically selects the correct current decay mode (fast decay or slow decay) Package Includes: 1 Set Stepper Motor Driver Specifications: Type: A4988/ DVR8825 Stepper Motor Driver Weight:7g Material:Metal Voltage:Maximum 45 V Color: Green/ Red Size:Approx 2X1.5cm /0.78X0.59in Type: Built-in Regulator note: Due to the differences of camera equipment, light intensity and display screens, the color of the item may be slightly different from that shown in the pictures.