Features: brand new and high quality High-intensity laser- LD+FAC spot compression, upgraded 40W laser- module with higher engraving speed Featuring precision and stability. Meanwhile ensure a lower loss to prolong the laser- module' s service life. 5.5W laser- module with heat sink, high-efficiency laser- engraving. Adopted spot compression and aggregation technology. Applicable to stainless steel material, clear and fast carving. Not limited to soft materials, much more practical to use. Can be used for stainless steel, aluminum material, plastic, ceramics, wood, bamboo, paper, leather, rubber, sponge paper, etc. (NOT support engraving metal, stone, glass, reflective or transparent materials.) Specifications: Brand：Twotrees Material: Metal Color: Blue Laser- Power: 40W Luminous Power: 5000~5500mw Laser- Wavelength: 445±5nm Engraving Accuracy: 0.01mm Item Size: Approx. 132x40mm / 5.2x1.57in Package Weight: Approx. 500g / 17.64oz Package Includes: Type A/B for Optional Type A 1 x 40W Laser- for Head 1 x 1M/3.28ft Cable 1 x Users Manual Type B 1 x 40W Laser- for Head 1 x 1M/3.28ft Cable 1 x Laser- for Head Module Mounting Bracket 1 x Users Manual note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.