Feature: 1. Real-time and accurate posture monitoring, if the back is bent more than 25 degrees, it will correct your posture via vibration alert. 2. Digit "8" styling, ergonomic design, conforms to the human body curve, comfortable to wear. 3. High-quality rubber material, good flexibility, no pressure on the shoulder when wearing. 4. Exercise back muscles, build muscle memory, and change bad habits. Used 2 hours each day and for 3 weeks, will have obvious effects. 5. 400mA large-capacity battery, long life, can be used for 15 days after 1.5 hours of charging. 6. It can continue to correct your posture for a long time without additional maintenance. Specification: Condition: 100% Brand New Item Type: Posture Corrector Material: ABS + Nylon + Rubber Optional Color: Pink, White Charging Output Interface: Standard V8 Interface Connect Cable Interface: USB Working Voltage: 5V Rated Power: 0.4W Charging Time: About 1.5 Hours Battery Capacity: 400mah (Built-in Battery) Package List: 1 x Posture Corrector 1 x Connect Cable