[Touchscreen LCD Design]The GRBL Offline Controller with Touchscreen LCD features an easy to read 2.8inch touchscreen display, which is very easy to operate. The touch screen control design of the offline machine can make controlling the engraving machine more simple and convenient. [Great Compatibility]The CNC Offline Controller is compatible with 3018/3020/4540 DIY CNC Router Series. [Easy & Simple File Access With SD Card]The SD card includes some files for testing. The function inside the touch screen offline machine is the same as the computer's control software, and you can also control every movement of the engraving machine as if you were operating on top of the engraving machine. [Free Your PC ]This touch screen offline controller can carry out engraving work more easily since it can free your computer well especially in long time engraving work. You can successfully and easily operate the engraving machine without connecting to a computer. Just put the project you need inside that SD card, and you can operate the engraving machine at any time. [Just Tap To Control]The cnc router touch screen offline controller can be used as the control software, through which you can control your engraving machine. You just need to click offline controller with your hand to operate it, which is very easy to operate as well as time saving. Accessories included:offline controller, SD card, offline Need battery:No Self programmable:Yes Screen material:LCD Colour:As Shown Material:plastic Package Contents: 1 * CNC GRBL Offline Controller 1 * SD Card 1 * Connecting Wiring 1 * U Disk Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.