Principle of Optical Imaging: The picture is not projected onto paper, through the lens sheet, you can see that the picture is imaged on the drawing paper. Tracing board has two sides, front and back, the projection effect of two sides is different, please use the front. Support Mobile Phones & Tablets: There are 2 splicing methods for bracket, simple and quick to assemble, support for most mobile phones and tablets. EASY TO OPERATE: Just need to download the APP, import the picture, put the phone on the shelf, and then you can start painting without drawing skills. Environmentally Friendly: The lens sheet is made of high quality PC material, good toughness, not easy to break. You do not need to print any pictures, environmental protection and energy saving. IDEAL TRACING TOOL: This tracing line drawing painting board is suitable for children, adults, comics/anime lovers, beginning artists, learn to draw at any age. Description: Color: as the picture Material: resin + plastic Attributes: Mobile phone Tablet universal Painting board Size: 20*13.5cm Bracket size: 10*7cm Notice: 1.Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before your purchase. 2.The colors may have different as the difference display,pls understand. 3.Please leaving a message before you give the bad feedback, if the products have some problems. Packing list: 1*Drawing board 1 set* Bracket