[Compatibility]Compatible with 3018, 3018 Max, 3020 Plus and 4540 series CNC engraving machines.<br> [TFT Touch Screen]Compared with LCD screen, TFT touch screen has the advantages of high responsiveness, brightness and contrast, making the display effect close to that of a CRT monitor.<br> [WIFI FER & SD CARD]Files can be ferred from computer to offline handheld controller via SD or Wifi network.<br> [Advanced Usage]User-defined keys can be defined by NC files, such as tool setting commands and return to commands.<br> [Convenient]This offline control can reduce the load on the computer for long-term engraving.<br> CNC engraving machine, CNC control, offline GRBL control module with TFT touch screen, suitable for CNC 3018/3020/ 3040pro/ 4540, for metal cutting wood processing<br> Colour:As Shown<br> Material:Metal<br> Package Contents:<br> 1 set x cnc controller<br> Only the above package content, other products are not included.<br> 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.