1. Versatile Stepper Motor Control This compact 42x42x10 mm expansion card features a robust integrated design, compatible with both A4988 and DRV8825 driver modules, providing flexible control for 42 stepper motors in 3D printers and DIY applications with 1230V input voltage support. 2. UserFriendly Configuration Equipped with an onboard DIP switch for easy microstep adjustments and terminal power connectors for simplified wiring, enabling quick setup of motor drive parameters to meet various project requirements. 3. Precision Control Interface Offers digital ports with dedicated direction, enable, and speed control (35.56 mm spacing) for accurate motor positioning and movement in automated systems and manufacturing equipment. 4. Performance in Compact Form Despite its small footprint, this driver board delivers reliable operation with 5V logic voltage and includes 3mm mounting holes for secure installation in tight spaces.