Product name: silicone invisible posture corrector (black)Material: food grade silicone collar, ABSSize (cm): 18.5*14.5*2CMWeight (kg): net weight: 90g, gross weight: 145gPackaging size (cm): 18*14*3CMRated input: 5V/1A,Working time: about 1 week of battery life (wearing 4 hours a day)Rated power: 2W,Battery capacity: 200mAh/3.7V 11. Intelligent induction: Our newly upgraded intelligent posture correction strap has the advantages of improving posture, non?sensing wearing, hunchback monitoring, etc.; built?in intelligent chip, accurate positioning, hunchback angle monitoring, when the hunchback exceeds 25 degrees, the chip automatically senses, and vibrate to remind; real?time monitoring of posture, scientific correction of posture, automatic memory function. 22. Correct posture: Our intelligent correction belt can fundamentally solve posture problems, exercise back muscles, cultivate the habit of straightening, and develop muscle memory. It also has the functions of vertebra correction, stretching and chest expansion, improving hunchback, preventing rickets, and protecting eyesight. 33. High?quality material: Made of soft and comfortable food?grade silicone material, ergonomically designed, fits the human body curve, is not easy to deform and is comfortable to wear. Built?in 200mah battery, powered by USB, can last for about 7 days when fully charged (wearing 4 hours a day). 44. Suitable occasions: The light and breathable correction belt can be worn invisible and can be used by adults and children; it is light and convenient, suitable for various occasions, such as work, study, walking, etc. 55. Packing list: You will get a corrective strap, 1 USB cable and a user guide, these accessories are packed in a simple color box, which is the perfect gift for yourself, family, friends.