The Invisible Smart Posture Correcto Is Lightweight And, Soft And -friendly, Not Easy To Deform, Fits The Human Body Features: Built-in high-precision chip, accurately record posture, real- monitoring of body tilt angle, vibration reminder. Automatic memory function, intelligent perception of incorrect posture, real- 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, eyesight, and reshape beautiful curves. Suitable for various such as work, study, walking, reading, etc., it fundamentally helps you solve your posture problems. The invisible smart aligner is made of food-grade, which is and, soft and-friendly, not easily deformed, fits the human body, and is comfortable to wear. : 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<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.