NEJE Master 2s 20W Laser Engraving Machine 5.5W Output Power 32 bit Motherboard | eBay
Amazon.com : NEJE A40640Ⅱ Laser Module, 10W+ Output Power, FAC Tech - 2 x Beam, Built in High Pressure Air Assist, Come with Metal Nozzle, Compatible with Laser Engraver and Cutter :