This kit contains all the parts except the laser module. Put your own laser module and create your custom DIY Laser engraver. This machine contains all the parts, excluding laser module, that is required for a laser engraver. 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. 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 for 1 hour, and then it.