Features1Automated Reminder: Posture corrector vibrates when it detects a hunchback angle of more than 25, gently reminding children to adjust their posture and maintain a healthy spine. 2Corrective Posture: Prolonged poor posture, especially during activities like reading, can lead to vision problems. Correcting posture is crucial for preventing issues and maintaining proper spinal alignment. 3Promote Confidence: Having good posture not only improves physical health but also boosts self confidence and overall well being. Help your child develop a healthy and confident posture with our smart corrector. 4Light Reminder: Red ray when charging, green light when fully charged, blue ray when working, elastic shoulder strap allows for a customizable fit, ensuring maximum comfort for all day wear. 5ABS: Constructed nylon materials, corrector provides optimal elasticity and comfort without causing shoulder discomfort. Kids can wear it for extended periods without feeling burdened.SpecificationItem Type: Electric Posture CorrectorMaterial: ABS, PC, high strength elastic nylon beltBattery Type: Lithium battery (built in)Battery Capacity: 150mAhInput Voltage: 5VRated Power: 2.5WLight Reminder: Red ray when charging, green light when fully charged, blue ray when workingCharging Time: 5 hoursPackage List1 x Host Strap 1 x Charging Cable 1 x User Manual