Description: Intelligent Posture Corrector --- Smart Posture Corrector will oscillate alarm automatically to remind user when your back is bent forward over 25 degrees, help you correct bad posture habits, keep you upright , more confident. Scientific Efficient Correction --- We recommend that user wear posture corrector two hours everyday. Posture can be significantly improved, 90 days of persistence will enter the period of habits stability. Wear Invisible & fit every People --- Upper straightener belts are compact size which wear under clothes invisibly without anyone noticing it, can be , work, study, outdoors, office, shop any other occasions. Adjustable harness is suitable for children and adults, men and women. Comfortable to Wear --- High elastic nylon fabric material is comfortable to wear without pressure on your shoulder , fit the human body. Shoulder straps can be adjusted to your most comfort length. Rechargeable & Long Standby --- Built in battery , can be used for 15 days after two hours charging. The switch is with an indicator light, the constant red light indicates charging, and constant blue indicates full/normal working. Specification: Material: ABS, Nylon Size Chart: 86mmx86mmx14mm/3.39inchx3.39inchx0.55inch Package Includes: 1 Piece Posture Corrector 1 Piece USB Charging Cable 1 Piece Manual Note: 1. Please allow slightly error due to manual measurement. 2. Due to differences between different monitors, the picture may not reflect the actual color.