A powerful laser can reach 15000mW pulsed, can engrave metal, cut wood, paper and other materials easily. This machine is a full set of parts, assembly required, if you need the instructions you can contact us after the purchase and we send them to you. Buy with confidence from JZelectric - We have the best customer support for this type of machines on eBay. Engraving materials: Wood, plastics, paper, bamboo, horns, and some cortex (purse), cell phone plastic shell, rubber stamp, photosensitive chapter, sponges 2. Can not be carved materials: stone, ceramic, shell, reflective material, metal, transparent material 2. It is recommended that the laser be too powerful in the case of focus. Do not use strong light to brighten the skin. 4.The product has a lifespan of 8,000 hours, it can last fo