Name: Self-energy induction corrector Charging interface: USB Android interface Battery specification: 400mA/3.7V Charging time: about 1.5 hours Material: ABS+PC+nylon belt Size：about 56x50x40cm Function: spine correction, anti-kyphosis color: gray quantity: 1 Description 1.Easily obtain confident and perfect standing and sitting posture 2.Easy-to-adjust double shoulder strap design improves posture and reduces shaking 3.Lightweight, highly elastic nylon can be worn comfortably under or above clothes 4.Eliminates shoulder, neck and back discomfort caused by sitting in front of the computer 5.Automatic sensor chip, vibration reminds incorrect posture 6.Back switch, within easy reach Package includes: 1x orthosis