1、With on‑screen memory function, you can check number of bad sitting postures per day. 2、Ergonomic figure‑eight design is adopted, and wearable fits curve of human body. 3、Elastic shoulder straps are comfortable and not restrained, and high‑quality rubber material, elastic enough, comfortable and not restrained. 4、Exercise back muscles, cultivate habit of straight back, and develop muscle memory. 5、Smart reminders are more effective, upgrade and improve angle of traditional correction belts, and cultivate habits. Condition: 100% Brand New Item Type: Posture Corrector Material: ABS+High-Strength Elastic Nylon Belt Built-In Lithium Battery Storage Function, USB Charging Method Battery Specification: 400mA/3.7V Features: At your fingertips: Center switch on the back, with a light press, turns on the smart vibration correction Vibration Reminder: When you hump 25°, orthosis will automatically vibrate to remind you, and every vibration will be recorded in LCD Wearing Method: 1. First adjust strap to a suitable length 2. After wearing, straighten your back and raise your chest, and then click switch to vibrate and work normally after voice prompt 3. Maintain correct posture until end of orthotic voice prompt 4. At this time, only chip has recorded your correct posture 1 x Posture Corrector 1 x USB Cable