Specification: Connection: USB (USB-CH340) Software: GRBL controller, Universal GcodeSender Master chip: 328P ( nano) driver: A4988 Color: Black material: plastic Spindle 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: Support Engraving machine suitable for this control board: 3018pro-METAL Engraving Machine CNC 3018 pro laser-Machine CNC 1610 DIY laser-Machine CNC 3018 Pro Max laser-Engraver CNC 2418 DIY Engraving Machine Package Contents: 1x GRBL 1.1 J 2 axis control board 1x USB cable 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.