The Blue Laser Modual is designed for both 3D printer and CNC mill.? With 450nm wavelength, it is an effective tool for laser engraving and laser cutting.? There 4 powerful laser modual for choose, they can engrave and cut a variaty of materials. Features: Blue Laser Modual --- Professional laser head with high speed and high stability. Bright blue-violet light, easy for locating when engraving. More Powerful and Clean --- 30W with more powerful in engraving and carving,? provide a neat and clear image.? High power also ensure a fast carving and cutting. ( focuse distance from carving objects keep 1.8cm) Easy to Assemble --- Small and compact, convenient and easy to install. 30W Carving Material --- Wood type, some plastics, paper, bamboo, horn, thin leather (wallet), rubber stamp, tooth, PU, Printing paper, PVC, horn, crab shell,? lobster, mammoth, ivory, linden root, resin, spectacle lens, metal painted surface,those kinds of flammable materials.?? And colored ceramics, colored aluminum, pebbles, etc.??? Part of stainless steel, anodized, dark electroplating, swimming paint, baking paint, wood grain transfer aluminum. Coke cans, mobile phone back shell, etc. 30W Cutting Material --- Within 3mm thick paper, leather, non-woven fabrics, flocking fabrics, aircraft wood, stickers, etc. Non-transparent plastic sheet within 2mm Black acrylic sheet within 2mm Specifications: Laser Power: 5500mW/10W/20W/30W (Optional) Material: Aluminum Alloy+Plastic Light Color: Blue-violet Wave Length: 450nm Facula Form: Punctiform, Adjustable Focus(30W can not adjust focuse) Input Voltage: 12V 2A Interface?Parameter:Support TTL signal controls power Item Size: 11*4*4cm / 4.33*1.57*1.57in Package Size: 15*15*5cm / 5.9*5.9*1.96in Item Weight: 281g / 9.91oz Package List: 1 * Laser Head