... USB port 3. Stepper motor driver 4. 60/80W laser power optional Laser cutter with ballscrew Applicable material marble, granite, ceramic, plate, ... crystal, ceramic, glass and other non-materials, etc. QL-1412 Laser Cutter With Ballscrews ModelJQ-1412Working area140cm * 120cm / 55in * 47inLaser power130W/150WLaser ... more questions about the machine, pls contact me freely! laser cutter with ballscrew