Optical imaging principle - The image is not projected onto the paper directly. You view the picture through the lens paper on the board. The trackpad has two sides (front and back) with different projection effects. Premium material - Built from durable acrylic that is thick, strong, and not easy to break. High visibility helps reduce shadows for clearer tracing. Safe and reliable construction. Optical drawing operation - The board can mirror an image from a smartphone and project it onto drawing paper. Please note that the projection effect differs between the front and back sides of the drawing board. Assembly method - The optical drawing board is assembled by splicing. There are two splicing configurations to create a size suitable for most phones or tablets, and it supports most mobile phones and tablets. Key benefits - Enables fast tracing and transfer of digital images to paper, improving accuracy and saving time. - Durable, reusable tool for artists, students, and designers. - Flexible compatibility with a wide range of smartphones and tablets through two assembly methods. Use scenarios - Artists and designers tracing or transferring digital sketches to paper for faster concept development. - Students copying diagrams or notes from their phone to paper in class. - Professionals such as architects or fashion designers projecting reference images onto paper for on-site sketching and layout planning.