NG3051 Lifting Reading Rack Children Multifunctional Reading Bookshelf Mobile Phone Tablet Stand,Type: Dual-use (Matte Blue Green)1. Function: Improve sitting posture, relax the cervical spine, care for eyesight, free hands, and open books with one hand 2. The height can be adjusted freely, adjust to head up reading 3. 10~40cm height can be adjusted, adults and children can use it comfortably 4. The elastic book holder design makes the book stable 5. 1KG weighted frosted alloy base, anti slip, stable and durable 6. The book holder stretches freely, the width of 11 52 cm is