It is a professional laser head with high speed and high stability. Features: This item is a necessary accessory for DIY engraving machine. Professional laser head with high speed and high stability. Adjustable laser head, easy to adjust, ensure engraving with good quality and high efficiency. Laser power adjustable 0-100%. Cutting Material: sponge paper, thin leather, paper . Carving Material: wood type, some plastics, paper, bamboo, horn, thin leather (wallet), rubber stamp, photosensitive, printing paper (material mainly used for carving, cutting can be relatively small), sponges, paper and so easy to burn Materials. Specifications: Laser Power: 500mw / 405nm, 2500mw / 450nm, 5500mw / 450nm (optional) Heatsink Material: Aircraft aluminum Laser Color: Blue Laser module dimension: 33*33*90mm / 1.3*1.3*3.5in Rated Input Voltage: AC 100=240V Drive Output Voltage: 12V Shape Of Laser: Dot (can be focused, focal length adjustable) Voltage: 12V Interface: 5.5*2.5 (500mw), XH2.54-3P (2500mw and 5500mw) Drive Mode: Built-in Driver (500mw), External Drive ((2500mw and 5500mw) Packing: Carton Package Weight: 195g /0.43lb Package Size:15.5*15.5*5cm /6.1*6.1*1.97in Note: Please allow 1-3cm differences due to manual measurement. Please wear laser goggles during using and avoid touching the laser directly with your eyes and skin. Package List: 1 * Laser Module 1 * Goggles 1 * Connection Cable