1,The professionally improved 40W fixed‑focus laser module has lower loss and higher accuracy. It can output 5W 450nm wavelength laser for high‑efficiency and high‑precision engraving and cutting, which will not disappoint 2,Upgraded version of 40W laser module, faster engraving speed, accurate and stable. At the same time, ensure low loss to extend the life of the laser module 3,5W laser module with heat sink, high‑efficiency laser engraving, can laser engrave photos, text, scan, outline and pixels 4,Using spot compression polymerization technology, the energy of the light source is more concentrated, with high efficiency 5,Suitable for stainless steel, and the engraving is clear and fast. Not only limited to soft materials, but more practical 6,Engraving stainless steel, aluminum, plastic, ceramic, wood, bamboo, paper, leather, rubber, sponge paper, etc. It does not support engraving of metal, stone, glass, reflective or transparent materials 1 x 40W Laser Head1 x 1M Cable1 x 20MM Focus Block1 x User Manual Item Type: Laser HeadMaterial: Aluminum AlloyColor: BlueLaser Power: 40WOptical Power: 5000-5500mwLaser Wavelength: 445 5nmEngraving Accuracy: Approx. 0.01mm / 0.0004in Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store