Feature: 1. Smart Chip: Smart posture corrector is equipped with smart sensors that will alert you through vibration when you have poor posture. It can help you maintain good posture habits, prevent and improve hunchback, and you can wear it anywhere. 2. Memory Function: Free to adjust the vibration reminder angle. Users can adjust the angle according to their age and physical condition. The main flash memory control chip has a memory function, data will not be lost when the battery runs out or power failure. 3. Adjustable Design: There are durable adjustable buckles, the shoulder straps are made of soft and breathable material, which won't hurt your armpits and make your shoulders comfortable, suitable for men, women and kids. 4. Lightweight and Portable: Straightener back brace can be worn on clothes at work or in daily life. It is suitable for people who sit at a desk for a long time which causes hunchback, shoulder soreness and lumbar discomfort. 5. Real Time Monitoring: Built in high accuracy motion chip can detect the body posture in real time, and can accurately catch the changes of the wearer's body posture through angle sensing and tension sensing. Specification: Item Type: Posture CorrectorMaterial: ABSBattery Type: Lithium ion battery Battery Capacity: 200mAh (shipped with built in battery). Package List: 1 x Posture Corrector1 x USB Cable