1.Don’t leave the machine to work alone. Someone must be present to operate it.(very important) 2.Please wear goggles during usage and avoid touching the light directly with your eyes and skin! 3.Smoke will be generated when burned, please pay attention to smoke exhaust indoors. <br><br><b>General Specification: </b> <br>Model: Oakeroo Master 2s Plus 30W <br>Optical Power: 450nm 7.5W <br>Control Board: 2 x MCU + Wireless control + MEMS <br>Satety Protection: MEMS <br>Working Size: 255 x 440 mm <br>Pixel: 3400 x 5866 px <br>Dot pitch: 0.075mm <br>Software: NEJE APP for Android, NEJE Wireless APP for iOS / macOS, NEJE software for windows,La-serGRBL with firmware GRBL1.1f,LightBurn(a paid software from the official website of Lightburn.) <br>NEJE software Upgrading Service: YES <br>Oakeroo Cloud Gallery: YES <br>Oakeroo Scanner function: YES <br>Frame material: CNC Cutting Composite plate, aluminum alloy, acrylic. <br><b>Can Engrave: MDF/Balsa/Paper/Wood/Fabric/Plastic/Leather/Plywood/Foam Paper/Anodized Aluminum(painted black) <br>Can Not Engrave: Metal/Glass/Stone/Ceramics/PCB/Stainless Steel/Reflective Material/ Transparent Material</b> <br>Continue working: Unlimited <br>Wavelength: 450nm <br>Beam Shape: Dot (Adjustable focus) <br>Drive: Built-in <br>Lens Material: D-ZK3 <br>Luminous Color: Blue <br>Input Voltage: AC100-240V, 50/60Hz <br>Output Voltage: DC12V, 3A <br>Image Format: .bmp \ .jpg \ .png \ .nc \ .dxf \ etc..