Description: GRBL compatible, work with arduino nano. Compatible with micro-drive engraving machine, three-axis CNC engraving machine Can control two-phase four-wire stepper motor to reach 2A. Released a digital IO interface, easy to connect to other modules, such as ENDSTOP. Release the I2C interface to connect to LCD I2C or other I2C modules Specification: Material: FR4 Size: 7 * 5.7 * 1CM Package Includes: 1x Engraving Expansion Board Kit
