Material: Nylon, ABSColor: greySpscification:Figure 8 The shape is ergonomic.It fits the curve of the human body when worn, and is made of nylon material, with elastic feet and comfortable shoulders.Induction vibration reminder, angle sensor, hunchback bending over 25, the corrector immediately vibrates reminder.The central switch on the back is within easy reach. The switch position is set reasonably, and adults can easily turn it on.It can be used for 15 days after hour of charging. The 400mA large-capacity battery has long battery life and continuous calibration.Non-slip buckle, easy to adjust, stable and not loose. needles, tight needles.High-elastic nylon waistband, high-standard manufacturing, good elasticity and more comfortable.Note:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement.Quantity : 1 PCSEasy to adjust, stable and not easy to loosen.Easy to adjust, stable and not easy to loosen. Non-slip buckle, easy to adjust, stable and not loose. needles, tight needles. It can be used for 15 days after hour of charging. The 400mA large-capacity battery has long battery life and continuous calibration. The central switch on the back is within easy reach. The switch position is set reasonably, and adults a can easily turn it on. Induction vibration reminder, angle sensor, hunchback bending over 25°, the corrector immediately vibrates reminder. It fits the curve of the human body when worn, and is made of nylon material, with elastic feet and comfortable shoulders.