... : adjustable from 1.5 A to 5A(1.5A,2.0A, 2.5A,3.0A,3.5A,4.0A,4.5A,5 ... .0A) Resolution: 1/2, 1/8, 1/16 , 1/32 , 1/64 , 1/128 ... =half current 0=full currrentCNC DB25 Breakout Board adapter stepper motor driver IIIBuilt in DB25 male connector. DB25 Output Pin:P1,P2 ... -coupler. High quality with Surface-mount Tech. 3 Axis two-phase Stepper motor Driver 5. 0A + DB25 Breakout Board adapter Kit