If you are looking for a Sitting Posture Corrector, then you miss our sitting posture corrector. Made of , it is durable and can serve you a long time. It can effectively protect children's eyesight and prevent problems such as hunchback. When the hunchback bends more than 25°, the corrector sensor immediately vibrates to remind, practical and convenient. Features -Color:Black -Material:ABS, Silicone -Size:12.47X13.80X11.90cm/4.90X5.42X4.68in -Rated Input:5V/1A -Rated Power:0.8W -Working Voltage:3.7V -Charging Time:2h -This Posture Corrector Sensor can be a for bone deformation caused by posture errors, and avoid visual impairment, and can also cultivate good sitting habits. -With corrector sensor, your kids can sit at a scientific direction and eye-protection. -You can get the practical and professional writing posture corrector . -Writing Posture Corrector is made of reliable and safe stainless steel, sponge material for long time use. -The Posture Corrector Sensor can be widely used. Suitable for kids doing homework, watching TV, reading and more. Package list: 1 x Posture Corrector Sensor