If you the control board, the GRBL Control Board option, not the offline controller.Parameter of control board:Connection: USB (USB-CH340)Software: GRBL controller, Universal Gcode SenderMaster chip: 328P ( nano) driver: A4988Spindle drive chip: MOSFET, the highest 60V (recommendation within 48V, current :within 10A )Support : 12V, maximum current of 2A or less is recommended within 1.5A and additional heat. (Any 42, 57)Laser-engraving: SupportSpecification of offline controller:Press Z+ and Z- , the Z axis will move up and down.Press X+ and X- , the X axis will move left and right.Press Y+ and Y- , the Y axis will move Front and Back.Press SPIN: Spindle on (Laser-on), Spindle off (laser-off)Press SMOD: returnPress Z+ for 5 seconds, change the Language to English.SD card: Included, you need a SD card reader to write into the directory G-code files. NOTE1. Not engraving machine can use control panel, it is a matter of compatibility.It is recommended that you are not whether it can be used, customer service buying.2. control panel has been updated to the latest version as shown :However, there are still some versions in , which will be shipped randomly. for your understanding!Colour:blackMaterial:pcbPackage Contents:1 x Control board + Offline controllerOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.