Buy from tutetech, https://bit.ly/2QtKe3x The instruction manual,https://bit.ly/2s0Ne8Z amazon list,https://amzn.to/2EUdY3p specification, Input voltage,12V Laser Power,15000MW Frame Material,Aluminium Alloy Machine Size,365mm * 285mm * 195mm Laser Area,240mm * 190mm Controlling system,GRBL(GRBLControl，grblcontroller，Universal，GcodSendeer etc) Laser material,woodm,bamboo,plastic,leather,paper,PVC,acrylic,Paint metal Machine weight,5.5kgs Shipping weight,4.5kgs Operation system,WinXP，Win7，Win8，Win10 No need assembly UCzjnJ-_wP1gl_NvqtE_dfEg laser engraver for #15000mw #USB #diy #laser #engraver #stainless #steel