Professional laser module, easy to install, with lower loss, provides 450nm wavelength, for efficient, precise engraving and cutting of plastic, wood, paper and so on, suitable for a wide range of engraving machine. Features: High Quality Material:laser module, features solid High quality aluminium alloy shell, high engraving speed, low power loss, stability, long lifetime. Efficient Work:with adjustable focal length (5.5W/ 10W/ 20W) or fixed focal length (30W/ 40W), flexible and easy to use, ensures fast, clear engraving with high efficiency, high precision. Powerful Ability:it can engrave plastic, wood, leather, rubber, acrylic and others, or cut wood and acrylic (the wattage determines its ability). Easy Assembly:small and compact laser module body, has 28cm long line, comes with nuts, convenient and simple to install on the machine. Wide Application:it works with laser cutting machine, laser engraving machine, CNC engraver, DIY laser and more, supports most engraving software. Specifications: Laser Power: 5.5W/ 10W/ 20W/ 30W/ 40W (Optional) --Adjustable Focal Length: 5.5W/ 10W/ 20W --Fixed Focal Length: 30W Material: Aluminium Alloy + Electronic Components Main Color: Red Wave Length: 450nm Input Voltage: 12V Output: Continuous (CW) Operating Temperature: 0℃~70℃ Storage Temperature: -40℃~80℃ Item Size: 4*4*11cm / 1.57*1.57*4.33in Package Weight: 235g / 8.28oz Package Size: 17*13*5cm / 6.69*5.11*1.96in Note: Laser module only, others in pictures are not included. Please do not use it without safety glasses. Due to manual measurement, there may be deviation. Due to lighting or other reasons, it may slightly differ from pictures. Packing List: 1 * Laser Module 3 * Screw 3 * Washer 1 * Laser Module 3 * Screw 3 * Washer