Description: 1.Made of food-grade silicone material, it is lightweight and durable, soft and skin-friendly, not easy to deform, fits the human body curve, and is comfortable to wear. An orthotic for children, adults, men and women. No binding. Easy to wear, for children and students to study at home, to correct sitting posture, to prevent hunchback. Product name: Smart Correction Wizard Model No.: MS-A9 LCD counting model Rated input: 5V/1A Operating time: approx. 1 week (4 hours of wear per day) Net weight: approx. 90g (including battery and neck collar) Function: Spinal correction, stretching and chest expansion, improving hunchback, protecting eyesight Material: Food grade silicone collar Imported ABS Charging interface: USB universal interface Battery capacity: 200 mAh Suitable for children, adults, men and women Package Included: 1* Invisible Smart Posture Corrector Note: 1. Due to manual measurement, there may be a slight tolerance of 1-3cm. 2. Due to difference between different monitors, the picture may not reflect the actual color of the item.