This is the newest version of EasyDriver V4 co-designed withBrian Schmalz. It provides much more flexibility and control over your stepper motor, when compared to older versions. The microstep select (MS1 and MS2) pins of the A3967 are broken out allowing adjustments to the microstepping resolution. The sleep and enable pins are also broken out for further control. Features - Color: Shown in the pictures. - Material: Plastic. -Size: Approx. 5 * 2 * 0.9cm/ 2 * 0.8 * 0.36 inch (L*W*H). - Compatible with 4, 6, and 8 wire stepper motors of any voltage. - MS1 and MS2 pins broken out to change microstepping resolution to full, half, quarter and eighth steps (defaults to eighth). - Adjustable current control from 150mA/phase to 750mA/phase. - Power supply range from 7V to 30V. The higher the voltage, the higher the torque at high speeds. Package Including 1 * EasyDriver Stepper