DescriptionEffectively correct the problem of incorrect posture of the back by training your muscles and spine to return to their natural alignment, and help them to have better skeletal development. Can improve your walking position, sitting posture, etc.Features-Color: Grey. -Material: Cloth &ABS. -Size: Approx. 12.4 x 12.4 x 6.5 cm / 4.88 x 4.88 x 2.56 inch.- Battery Specification: 400mA.- materials are and fit the human body when used. - Ergonomic and provides adequate pressure to correct the hunchback, release back pain and improve your good posture.- When the user's hunched bends is abnormal, the aligner immediately vibrates to remind you to correct the posture in time.- Our hunchback corrector is for using in environments such as office, home, driving, sports and even social activities.- Gives you a healthy back position easily and quickly so you can look better and confident again.