Specification:<br /><br />Engraver CNC Shield Board:<br /><br /><br />    Version: 3.0<br /><br /><br /><br />    Color: Red<br /><br /><br /><br />    Size(L*W*H): Approx. 68 x 53 x 18 mm<br /><br /><br /><br />    Voltage:DC 12~36 V (At the moment only the DRV8825 drivers can handle up to 36V so please consider the operation voltage when powering the board.)<br /><br /><br />    Features:<br /><br /><br />    Uses removable A4988 or DRV8825 compatible stepper drivers.<br /><br /><br />The extension board can be used for carving machine・ 3 d printer driver expansion board<br /><br /><br /><br />    GRBL 0.8 compatible. (Open source firmware that runs on an Arduino UNO that turns G-code commands into stepper signals)<br /><br /><br /><br />    PWM Spindle and direction pins・4-Axis support (X・ Y・ Z ・ A-Can <br />duplicate X・Y・Z or do a full 4th axis with custom firmware using pins <br />D12 and D13)<br /><br /><br /><br />    Compact design. Stepper Motors can be connected with 4 pin molex connectors or soldered in place.<br /><br /><br /><br />    Please note that this is an unassembled kit and Basic soldering skills are needed.<br /><br />A4988 Stepper Motor Driver:<br /><br />Color:Red<br /><br /><br /><br />    Size(L*W*H):20 x 15 x 10 mm<br /><br /><br /><br />    Thermal shutdown circuitry:Yes<br /><br /><br /><br />    Crossover-current protection:Yes<br /><br /><br /><br />    Ground fault protection:Yes<