450nm 40W Laser Module with Protective Cover Fixed Focal Length Laser Engraving Head High Speed Laser Engraver Cutter 3D Printer CNC Router Laser Module for DIY Craft Wood Leather Fabric Paper Cutting EngravingProfessional 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). Made of premium quality alloy casing with great durability.
It can engrave paper, wood, fabric, plastic, leather, anodized , 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, its designed for laser engraver, laser cutting machine, 3D printer, CNC mill and so on, suitable for DIY lover, CNC engineer, artist and more
Note:
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/ 40W (Optional)
--Adjustable Focal Length: 5.5W/ 10W/ 20W (20-70mm)
--Fixed Focal Length: 30W (12.6mm)/ 40W (15mm)/ 40W (40mm)
Color: Wine Red
Material: Aluminum Alloy + Electronic Components
Wave Length: 450nm
Luminous Color: Blue
Operating Voltage: 12V
PWM/ TTL Input: DC 3.3V-12V, 100Hz-50KHz
Input Interface: XH2.54-3 Pin (+, -, PWM/ TTL)
Continuous Working: Unlimited
Operating Temperature: -20℃~70℃
Laser Head Size: Approx.
5.5W/ 10W: 105 * 30 * 30mm / 4.13 * 1.18 * 1.18in
20W: 120 * 40 * 40mm / 4.72 * 1.57 * 1.57in
30W (12.6mm)/ 40W (15mm): 115 * 40 * 40mm / 4.53 * 1.57 * 1.57in
40W (40mm): 100 * 40 * 40mm / 3.94 * 1.57 * 1.57in
Package Size: Approx. 16 * 6 * 6cm / 6.30 * 2.36 * 2.36in
Packing List:
1 * Laser Module
3 * Screw
3 * Washer
1 * Small Plastic Sheet
1 * User Manual (English)