:100% Brand New and High quality.Improve posture & reduce slouching immediately with easily adjustable dual strap design.Posture corrector uses a high-elastic nylon belt for better elasticity and more comfort.It is breathable and not sultry.Smart posture corrector can help you to correct bad posture habits and relieve pain in your neck back and shoulder, you will be more confident with your head high.The correction has the latest inductive design,it will let you actively adjust the correct posture through vibration reminder, instead of the restraint of the traditional correction strap.Back corrector uses a 500mAh polymer lithium battery and can be used for about 15 days after 1 hours charging, it is easy to charge by connecting USB cable.Specification:Material:ABS + Nylon Strap.Gender:Unisex.Battery Capacity:500mAhWorking Voltage:5V.Charging Time:Approx. 1hrs.Using Time:15 daysCharging Voltage:5V.Charging Method:USB Charging.Size : Free sizePackage Included:1* Posture CorrectorNote:1 This product comes with three reminder modes, A: Vibration reminder mode, B: Didi sound alarm reminder mode, C: Vibration and alarm reminder together, the three modes can be switched freely, which can better remind parents and children to supervise together Sitting posture, develop good sitting habits as soon as possible.2 Using the gyroscope tilt chip on the mobile phone, the angle detection is more accurate, without false or non-reporting.