Features: Principle of Optical Imaging: The picture is not projected onto paper; through the lens sheet, you can see that the image appears on the drawing paper. The tracing board has two sides, front and back, with different projection effects. Please use the front side for best results. Support for Mobile Phones & Tablets: The bracket offers 2 splicing methods—simple and quick to assemble—and supports most mobile phones and tablets. Smart APP Compatibility: You can download the "Pencil Sketch" app or other compatible software to your mobile device, select your favorite images, and convert them into sketches for tracing. Environmentally Friendly Design: The lens sheet is made of high-quality PC material with excellent durability and resistance to breakage. No need to print images, making it eco-friendly and energy-saving. Ideal Tracing Tool: This tracing board kit helps develop hand-eye coordination and basic drawing skills. It is safe for the eyes and allows you to paint on paper, clothing, bags, and more. Suitable for children, students, adults, beginners, anime fans, and art enthusiasts.