Effectively correct the problem of incorrect posture of the adults' back, and help them to develop better skeletal development. Effective correction for 's walking position, due to long-term sitting posture is not correct. Features - Color: Green - Material: ABS, nylon belt - Size: About 15.00X15.00X1.50cm/5.89X5.89X0.59in - Charging Output Interface: Standard interface. - Operating Voltage: 5V· - Rated Power: 0. . - Charging Time: About 1.5 hours. - Charging Voltage: 5V. - Made from premiere material, durable to use. - When the bending curve exceeds 15°, the is automatically activated to remind. - Suitable for women, students, adults to use etc. - It prevents chest sagging and humpback, you will have the nice-looking figure. - Wearing for a long time can improve bad posture on the back and improve self-confidence. Package list: 1 x Posture Correction Belt 1 x USB cable