Sunwin 200~250mw Red Light 300mw Violet Light 500mw Violet Light Desktop Laser Engraving Machine DIY Cutting Logo Picture Image Marking Printer (500mW Violet Light) This 200~250mW Red Light/300mW Violet Light/500mW Violet LightDIY desktop violet laser engraving machine is ideal for amateur laser engraving usage with grayscale printing,low-light positioning and freedom positioning functions.It only need you to connect it to the computer,then you can print any pictures your like with your own creativity. Material: stainless steel and acrylic Working Voltage DC 12V Laser Power 200~250mW Red Light/300mW Violet Light/500mW Violet Engraving Accuracy 0.01mm Engr Can be processed material :wood ,plastic, bamboo, ox horn,Opaque plastics ( phone case ) , some leather(eg, purse) ,seals , cardboard , paper, bank cards, discount cards ( non-metallic ) , Rubber,photosensitive seal,sponge paper etc. Can NOT be processed material :Metals(no matter thick or thin), stones, ceramics, glass,jewelries, reflecting material, colourless and transparent material, soft material. Support Windows 7,XP,2000