Applicability: Engineered with a user-friendly design, this module is compatible with A4988 and DRV8825 modules, interface ensuring easy installation and seamless integration into your project. Terminal Power: The stable 42 stepper motor driver expansion board is a terminal power connector and you can easily connect power supply, which provides convenience largely. Fixed Hole: 3mm Hole distance: 1400x1400mil (35.56x35.56mm) Logic voltage: 5V Input voltage: 12-30V Port: Number Interface: direction, enable, speed Applicable modules: A4988, DRV8825 Note: Please pay attention to the direction when installing the driver module, otherwise the module be burnt This product is only an expansion board, does not include 4988/8825 drive modules. Different batches may have different appearance/color of components and different silk-screen batch numbers, but not affect the use Colour:Black Material:PCB+electronic components Package Contents: 2 x 42 stepper motor drive expansion board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.