Correct Reading and Writing Posture: Children can maintain eye health and learn postures while reducing body and eye fatigue, neck and eye pain, and promoting correct reading and writing postures. Adjustable in 6 gears: 0-60 height adjustable, triangular principle, firm and stable, easy to adjust, if you hold your posture for a long time, you will feel tired. And this reading frame can change the angle as you like, so you'll never be bored again. Anti-slip design: The bottom contains 4 anti-slip pads that can be read with peace of mind and are not easy to slide. Convenient to Carry: foldable, easy to carry, can be used anywhere in your pocket. Such as: at school, home, on the train, etc. The material selection is made of high quality metal, which is environmentally friendly, non-toxic, strong and durable, and has no odor. Applicable to books of various sizes: This bookcase can be expanded to accommodate books of any size. For example: recipes, A4 paper, reference books, storybooks and tablet computers.