Connection: USB (USB-CH340)Software: GRBL controller, Universal Gcode SenderMaster chip: 328P (for nano)Stepper motor driver: A4988Laser engraving: SupportSpindle drive chip: MOSFET, the highest 60V (recommendation within 48V, current :within 10A )Support stepper motor: 12V, maximum current of 2A or less is recommended within 1.5A and additional heat. (Any stepper motor 42, 57)Specification 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 root directory G-code files.NoteNot every engraving machine can use our control panel, it is a matter of compatibility.Colour:As ShownMaterial:plasticPackage Contents:1 x cnc controller boardOnly 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.