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. Adjustable Focuse --- Adjustable laser head, easy to adjust, ensure engraving with good quality and high efficiency. Easy to Assemble --- Small and compact, convenient and easy to install. 5500mW 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. 5500mW Cutting Material --- Within 1.5mm thick paper, leather, non-woven fabrics, flocking fabrics, aircraft wood, stickers, etc. 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 InterfaceParameter:SupportTTLsignalcontrolspowerItem Size: 9.5*3*3cm / 3.74*1.18*1.18in Package Size: 15*15*5cm / 5.9*5.9*1.96in Item Weight: 117g / 4.13oz Package List: 1 * Laser Head