elegoo mars 2 pro 3d printer, 2k mono msla uv photocuring resin lcd 3d printer front usb input 2k monochrome lcd 5.1x3.1x6.3inch printing size elegoo save time and money: 2k mono qhd resolution lcd screen has 3x faster printing than rgb lcd screen, single-layer exposure only takes 1-2 seconds. mono lcd's lifespan is 4 times that of rgb lcd screen, save material and costs.