Feature:1. Upgraded version: Equipped with adjustable protective cover to protect your eyes, no need to wear extra laser glasses while working, safer to use than ordinary laser head.2. With adjustable focal length (5.5W/ 10W/ 20W, 20-70mm) or fixed focal length (30W, 12.6mm/ 40W, 15mm/ 40W, 40mm/ 80W,40mm). Made of premium quality aluminum alloy casing with great durability.3. It can engrave paper, wood, fabric, plastic, leather, anodized aluminum, etc. Different laser modules for engraving/ cutting different kinds of material and different thicknesses.4. Features high engraving speed, low power loss, good stability and superior performance, with fine heat dissipation to extend its service life.5. Compact and lightweight, easy to assemble, has over 30cm long line. Comes with screws, convenient and simple to be installed on the machine.6. Wide application, it\u0027s designed for laser engraver, laser cutting machine, 3D printer, CNC mill and so on, suitable for DIY lover, CNC engineer, artist and moreSpecification:Professional laser module, easy to install, with lower loss, provides 450nm wavelength, for efficient, precise engraving and cutting of plastic, wood, leather, paper and so on, suitable for a wide range of engraving machines. This is the upgraded version with protective cover, safer to use than the old one.Features:Upgraded version: Equipped with adjustable protective cover to protect your eyes, no need to wear extra laser glasses while working, safer to use than ordinary laser head.With adjustable focal length (5.5W/ 10W/ 20W, 20-70mm) or fixed focal length (30W, 12.6mm/ 40W, 15mm/ 40W, 40mm/ 80W,40mm). Made of premium quality aluminum alloy casing with great durability.It can engrave paper, wood, fabric, plastic, leather, anodized aluminum, etc. Different laser modules for engraving/ cutting different kinds of material and different thicknesses.Features high engraving speed, low power loss, good stability and superior performance, with fine heat dissipation to extend its service life.Compact and lightweight, easy to assemble, has over 30cm long line. Comes with screws, convenient and simple to be installed on the machine.Wide application, it's designed for laser engraver, laser cutting machine, 3D printer, CNC mill and so on, suitable for DIY lover, CNC engineer, artist and moreNote:1. Avoid eye or skin exposure to direct or scattered laser light.2. Size and color may be slightly different due to manual measurement and different light conditions. Thanks for understanding.Specifications:Laser Power: 5.5W/ 10W/ 20W/ 30W/ 40W/ 80W (Optional)--Adjustable Focal Length: 5.5W/ 10W/ 20W (20-70mm)--Fixed Focal Length: 30W (12.6mm)/ 40W (40mm)/ 80W (40mm)Color: SilverMaterial: Aluminum Alloy + Electronic ComponentsWave Length: 450nmLuminous Color: BlueOperating Voltage: 12VPWM/ TTL Input: DC 3.3V-12V, 100Hz-50KHzInput Interface: XH2.54-3 Pin (+, -, PWM/ TTL)Continuous Working: UnlimitedOperating Temperature: -20~70Laser Head Size: Approx.5.5W/ 10W: 105 * 30 * 30mm / 4.13 * 1.18 * 1.18in20W: 120 * 40 * 40mm / 4.72 * 1.57 * 1.57in30W (12.6mm): 115 * 40 * 40mm / 4.53 * 1.57 * 1.57in40W (40mm): 100 * 40 * 40mm / 3.94 * 1.57 * 1.57in80W(40mm): 125 * 47 * 44mm / 4.92 * 1.85 * 1.73inPackage Size: Approx. 16 * 6 * 6cm / 6.30 * 2.36 * 2.36inPacking List:1 * Laser Module3 * Screw3 * Washer6 * Paper Card1 * Laser Shield (Green)1 * User Manual (English)Package List:1 * Laser Module3 * Screw3 * Washer6 * Paper Card1 * Laser Shield (Green)1 * User Manual (English)