Item Type:Massage & Relaxation Certification:CE Application:Back Material:Food grade silicone + imported ABS Model Number:Posture Corrector Battery life:about 1 week (wearing 4 hours a day) Battery capacity:200mAh/3.7V Feature:Back correction Feature 1:Sitting Posture Straightener Feature 2:Smart correction belt Silicone Invisible Posture Corrector Anti-Humpback Male Ladies Adult Children Portable Posture Correction Device Protect Eyesight Office Home Walk USB Charging Specifications: Material: Food grade silicone + imported ABS Color: black Size: 18.5*14.5*2CM Weight: 90g Packing size: 18*14*3CM Rated input: 5V/1A Battery life: about 1 week (wearing 4 hours a day) Rated power: 0.4W Battery capacity: 200mAh/3.7V Packing List: 1* Posture Corrector 1* USB Charging Cable 1* English User Manual Features: 1.Made of food-grade silicone material, it is lightweight and durable, soft and skin-friendly, not easy to deform, fits the human body curve, and is comfortable to wear. 2.The built-in high-precision chip can accurately record the posture, monitor the change of the body inclination angle in real time, and vibrate to remind. 3.The automatic memory function can intelligently sense incorrect posture, monitor posture in real time, and scientifically and effectively help you correct unhealthy postures such as hunchback. 4.Helps correct wrong body posture of the back and shoulders, improve hunchback, develop correct body posture, protect eyesight, and reshape beautiful curves. 5.It is suitable for a variety of occasions, such as work, study, walking, reading, etc., and fundamentally help you solve postural problems.