Specification: Material: food grade silicone and imported ABS Colour: Black Size: 18.5x14.5x2CM Rated input: 5V or 1A Battery life: about 1 week (wearing 4 hours a day) Rated power: 0.4W Battery capacity: 200mAh or 3.7V Features: 1. It is made of food-grade silicone material, which is light and durable, soft and skin-friendly, not easy to deform, fits the human body curve, and is comfortable to wear. 2. Built-in high-precision chip, real-time and accurate recording of posture monitoring changes in body tilt angle, and vibration reminder. 3. Automatic memory function, real-time intelligent perception of incorrect posture monitoring posture, scientifically and effectively help you correct unhealthy postures such as hunchback. 4. Help correct wrong body posture of back and shoulders, improvehunchback, develop correct body posture, protect eyesight, and reshape beautiful curves. 5. It is suitable for various occasions such as work, study, walking, reading, etc., and fundamentally help you solve the problem of posture. Packing List: 1 Smart Posture Corrector