... motor driver 4. 60/80W laser power optional Marble laser engraving machine Marble laser engraving machine features1). The upper part ... Scanning Precision2500 DPIOperating Temperature0 – 45 DegreeOperating Humidity5- 95% Applicable material marble, granite, ceramic, plate, wood, acrylic, organic glass, crystal, ... more questions about the machine, pls contact me freely! Marble laser engraving machine