... controller uses DSP technology and enhancing data processing speed 2.engraving speed can reach up to 8m /minute. Applications This HB ... -metal and some soft metal materials, for example, acrylic, PVC, Foam board, stone, copper, aluminum, plastic plate, wood, glass etc.Main ... , AC380V. 50Hz or 60HzSample pictuer: hot sale granite stone laser engraving machine