<b>Description:</b><br>This mini laser engraving machine with high precision and high stability is great for DIY engraving.Unique frame and weak light automatic positioning.Adjustable blue laser head, high speed and support more types of materials.<br><b>Protective glasses included?</b><br>Not included. The mini laser engraving machine has been upgraded, Glasses is relpaced with protective board, safer than before, please rest assured to buy.<br><b>What about the laser head life?</b><br>Normally, about 3 months to 1 year, but it's also closely related to how you use it. Main factors include: temperature, time intensity, current, voltage, anti static treatment, etc.<br><b>How to judge the laser head burned?</b><br>1. When the machine is working, the light was significantly weakened.<br>2. When the machine is working, the light is scattered and weakened, and unable to focus.<br>3. It can't burn out the object when the burning time, carving material and focal length are right.<br><b>3 Months Warranty for Laser Head:</b><br>If burnout problem of the laser head arises during warranty period, we will offer replacement laser head for free.<br><b>NOTE:</b><br>1. It can not engrave metal, acrylic and any other retardant material.<br>2. To prevent the laser head from burning out caused by overheating, please turn off the machine for at least 5mins after 30mins continuous working.<br><b>Specifications:</b><br>Material: Acrylic Aluminum Stainless Steel<br>Main Color: Black<br>Power: 3000mW<br>Laser Wave Length: 405nm<br> Image Format: bmp,jpg,png<br>Supply Voltage: 4.2-5.5V<br>Supply Current: 1A<br>Work Area: 38 * 38mm<br>Item Size: 6.30 * 5.71 * 7.48in<br>Item Weight: 976g / 34.43oz<br><b>Package List:</b><br>1 * Engraving Machine<br>1 * Whiteboard Marker<br>2 * Paper<br>1 * Wood Block<br>1 * Protective Board<br>1 * Allen Wrench<br>1 * Focusing Film<br>1 * USB Cable<br>1 * Power Cable<br>1 * Power Adapter<br>1 * User Manual(English)