【Strong Compatibility】: This driver expansion board is 3 axls stepper motor driver, compatible with micro-drive laser engraving machine, three-axls CNC engraving machine 【Use with Nano】: Power DC 5V interface, 7.5-12V voltage input. This engraving machine sield drive board with USB cable 3D printer kit is compatible with GRBL, and works with nano 【Extra Connection】: This 3D printer kit releases the digital IO interface, easy to connect to other modules, such as ENDSTOP, it also releases the I2C interface, you can connect to the LCD I2C or other I2C module 【Powerful Control】: 2A can be controlled within the two-phase four-wire stepper motor 【Specifications】: V4 Board Size: 7.2 x 5.9cm / 2.83 x 2.32" Nano Board Size: 4.3 x 1.8cm / 1.69 x 0.7" Driver Size: 2 x 1.5cm / 0.78 x 0.59" Heat Sink Size: 0.8 x 0.8cm / 0.31 x 0.31"