The Book Holder With Different Notches On The Movable Backrest Can Be Adjusted In Height And Angle As Required. Promote Proper Posture To Improve Spinal 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. It'S 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. Also Suitable For Home, School, Office, Library, Dormitory, Etc.