3 Adjustable Reading Positions: There are 3 slots on the removable back bracket of the book holder, which can adjust the height and angle according to your needs. It can effectively correct children's bad reading posture, reduce the burden on the head and neck, and promote spinal health. Foldable and Lightweight: When you go out, you can fold the book holder and store it in a backpack, which is lightweight and portable, very suitable for carrying and using when going out or traveling. When using: Our document holder is perfect for fixing your books, such as cookbooks, recipes, documents, textbooks, sheet music, but can also be used to display presentation materials, tablets, mobile phones and other things that need support. Suitable for kitchens, offices, schools, libraries, dormitories, etc. Ergonomic Design: The book holder is made of high-quality stainless steel and iron, with polished surface and back paint, which is sturdy, smooth and rust-proof. And has rounded corners to protect your hands from damage or scratches.