ZDD 6 adjustable reading positions. The book holder with different notches on the movable backrest can be adjusted in height and angle as required. Promote proper posture to improve spine health.Ergonomic design: The adjustable metal bookcase with ergonomic design can relieve pressure on the head and neck, and children can correct poor reading positions effectively (reusable).High-quality materials: The bookcase is made of high quality stainless steel and steel. The surface is polished and varnished. Its strong, smooth, rust-proof, not easy to break, and easy to clean. The bookcase looks simple and elegant and has rounded corners to protect your hands from being injured or scratched.Foldable and portable: The bookcase can be quickly folded for easy storage. You can carry and store it in a backpack for outdoor activities without taking up too much space when not in use. Product colorblue Product specification: 20*22*2cm Product list: 1 * reading frame