Geevorks 20W Laser Module 450nm Engraving Laser Head Adjustable Focal Length High Precision Engraving Plastic Leather Wood Acrylic for Laser Engraving Machine CNC Router Cutting Machine 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: Material:laser module, features solid 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/80W), flexible and easy e, 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 /80W (Optional)--Adjustable Focal Length: 5.5W/ 10W/ 20W--Fixed Focal Length: 30W/40W/80WMaterial: Aluminium Alloy + Electronic ComponentsMain Color: RedWave Length: 450nmInput Voltage: 12VOutput: Continuous (CW)Operating Temperature: 0~70Storage Temperature: -40~80Item Size:4*4*11cm / 1.57*1.57*4.33inPackage Weight: 315g /11.11ozPackage Size: 17*13*4cm / 6.69*5.11*1.57in 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 Module3 * Screw3 * Washer6 * Paper Card1* Use Manual