Adjustable Kids Sitting Posture Corrector Plastic Support Device for Students Preventing Myopia and Hunchback

Description: Correct sitting posture is helpful to correct wrong reading and writing posture for our kids and students. The top for supporting chin, made of soft silicone, smooth and soft does not hurt the skin. With ungraded adjusting knob,can adujust height,adapt to different age groups of children of different height. Adjustable Height: 21-31.5cm. Let the child develop the correct posture,so that they could play a role in the prevention of myopia and hunchback. Protect Eyesight with Audible Sensor, Develop to Good Habits of Reading and Writing Easy to install and use. Specification: Material: Plastic Adjustable Height: approx. 21-31.5cm/8.27x12.40inch. Package Includes: 1 Piece Sitting Posture Corrector for Students Note: Vary Color Choose: Blue 1 and Pink 2, It will make "De De" voice when the sitting posture is incorrect. If you feel you will bother learning, the voice function can be turned off by yourself. Blue 3 and Pink 4, It has no incorrect posture "De De" voice tips. Pls Choose the perfect one for your kids.