... good at processing small-format working pieces in high efficiency & high precision,Working without computer,standard configuration of 32M storage ... price, suitable for letters, images engraving on copper, aluminum products, any copper molds, mini die molds, stainless steel chest- ... 7.Vacuum System(optional) 1500W 300x250x40mm SD3025MV Mini CNC Router CNC Engraver processing small precision instruments