1. Posture trainer back with vibration – straight back straightener electric back strap for children men women. The product vibrates when the back is bent more than 25 degrees to help you correct a poor sitting and standing posture. The battery capacity of 400 mAh can be used for 360 hours with a fully charged battery. 2. Back posture correction – intelligent vibration back strap, back stabiliser adjustable back support for children and adults. The Smart Posture Corrector promotes longterm muscle memory, so you can stay upright even without the corrector. 3. Electronic posture correction The back corrector helps you improve poor sitting posture and humping problems. The back brace helps you regain proper posture, which can help prevent the occurrence of back, neck and shoulder pain. 4. Back support belt and comfortable fit, lightweight and breathable. It helps to radiate confidence and elegance while protecting the of your body. This intelligent neck posture corrector is ideal for office workers and adolescent children who often sit in a bad posture.