Applicability: Engineered with a user-friendly design, this module is compatible with A4988 and DRV8825 modules, ensuring easy installation and seamless integration into your project. Terminal Power: The stable 42 stepper motor driver expansion board features a terminal power connector for easy connection to a power supply, providing convenience. 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 may be damaged. This product is an expansion board only and does not include A4988 or DRV8825 driver modules. Note: Different production batches may vary in component appearance, color, or silkscreen markings, but this does not affect functionality. Color: Black Material: PCB and electronic components Package Contents: 2 x 42 Stepper Motor Drive Expansion Board Note: The package includes only the items listed above. Other products are not included. Note: Lighting conditions and display settings may cause slight color variations between the image and the actual product. Measurement error is +/- 1-3cm.