Features 1、1. The invisible smart aligner is made of food-grade silicone material, which is light and durable, soft and skin-friendly, not easy to deform, conforms to the human body curve, and is comfortable to wear. 2、2. Built-in high-precision chip, accurate posture recording, real-time monitoring of body tilt angle changes, vibration reminder. 3、3. Automatic memory function, an intelligent perception of incorrect posture, real-time monitoring of posture, scientifically and effectively help you correct unhealthy postures such as hunchback. 4、4. Help correct the incorrect body posture of the back and shoulders, improve the hunchback, correct the body posture, protect the eyesight, and reshape the beautiful curve. 5、5. It is suitable for various occasions such as work, study, walking, reading, etc., and fundamentally helps you solve the problem of posture. Material: abs+silicone Color: red/blue Size: one size Suitable people: Children/Adult unisex Function: Spine correction, stretch the chest, improve sitting posture, protect eyesight Package List 1 *Posture Corrector 1 *USB Cable 1 *Instruction