A must have upgrade if converting over to a laser engraver. I was so impressed by the board that I ordered a few more for my other creality printers. Such an inexpensive upgrade that makes your years old machine state of the art. Even in comparison to the 4.2.2 board this one blows it out of the water. If your going to do a laser engraver from Comgrow get this board, an ender 3 pro, and a creality rail extension kit to really give you options.
really silent card. it replaces a 4.2.2 card and it blew me away.
I am very happy with my purchase.