Upgrade Blue Laser Module with Lower Loss and Higher Precision 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: Upgrade Blue Laser Module --- Professional laser head have upgrade with a lower loss and higer precision and keep with high speed and high stability, at the same time prolong the laser modual's service time. Bright blue-violet light, easy for locating when engraving. Adjustable Focuse --- Adjustable laser head, easy to adjust, more flexible use and ensure engraving with good quality and high efficiency. Easy to Assemble Safety Use --- Small and compact, convenient and easy to install. Come with a protect goggles, ensure a safety working process. 20W 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. 20W 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: Color: Black/Red (optional) 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:SupportTTLsignalcontrolspower Line Length: 330mmItem Size: 99*40*40mm / 3.90*1.57*1.57in Item Weight: 184g / 6.49oz (5500mW/10W/20W) 221g / 7.80oz (30W) Package List: 1 * Laser Head 1 * Pretect Goggles 1 * Bag of Installation Accessories 1 * Screwdriver