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 or 10W or 20W) or fixed focal length (30W or 40W or 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 or 10W or 20W or 30W or 40W or 80W (Optional) - Adjustable Focal Length: 5.5W or 10W or 20W - Fixed Focal Length: 30W or 40W or 80W Material: Aluminium Alloy and Electronic Components Main Color: Red Wave Length: 450nm Input Voltage: 12V Output: Continuous (CW) Operating Temperature: 0℃-70℃ Storage Temperature: -40℃-80℃ Item Size: 4x4x11cm or 1.57x1.57x4.33in Package Weight: 315g or 11.11oz Package Size: 17x13x4cm or 6.69x5.11x1.57in 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 x Laser Module 3 x Screw 3 x Washer 6 x Paper Card 1x Use Manual