... 3.DSP controlling DM-1121L marble Laser engraverMarble Laser engraving machineDM-1121L marble laser engraving parameter,1. Laser tube, 60w2. Working area, 110cm*210cm3 ... down worktable,3).Red light pointer, the unit makes the laser path visible4).USB port, the unit that makes the machine ... , wood, stone, marble, gravestone, rubber, leather, fabric, paper, cloth, dual-color boards, and so on.