Ergonomic design, adjustable shoulder strap, light and durable, soft and skin-friendly, fits the curve of the human body, comfortable to wear without sweating. Built-in high-precision motion chip, monitors the posture in real time, accurately captures the changes in the wearer's posture, and vibrates in time to remind you to scientifically and effectively help you correct unhealthy postures such as hunchback. It helps to correct the wrong body posture of the back and shoulders, improve hunchback, develop correct body posture, protect eyesight, and prevent myopia.