The Invisible Smart Posture Correcto Is Lightweight And Durable, Soft And Skin-friendly, Not Easy To Deform, Fits The Human Body Curve Features: Built-in high-precision chip, accurately record posture, real-time monitoring of body tilt angle changes, vibration reminder. Automatic memory function, intelligent perception of incorrect posture, real-time monitoring of posture, scientifically and effectively help you correct unhealthy postures such as hunchback. Help correct wrong body posture of back and shoulders, improve hunchback, correct body posture, protect eyesight, and reshape beautiful curves. Suitable for various occasions such as work, study, walking, reading, etc., it fundamentally helps you solve your posture problems. The invisible smart aligner is made of food-grade silicone material, which is light and durable, soft and skin-friendly, not easily deformed, fits the human body curve, and is comfortable to wear. Product Description: Product size (cm): 18.5*14.5*2CM Rated input: 5V/1A, Working time: The battery life is about 1 week (wearing 4 hours a day), Rated power: 0.4W, Battery capacity: 200mAh/3.7V Product list:: posture corrector*1, manual*1, USB charging cable*1