Adult Kids Posture Corrector With Smart Sensor Vibration Reminder100% brand new and high quality Type: posture correctorCharging Voltage: 5VSize: as picture shownStandby Time: 360 hoursBattery Capacity: 200 mAhMaterial: plastic, nylon beltColor: space greyCharging Time: 2 hoursPackage Included:1 x Posture Corrector + 1 x USB charging cable + 1 x InstructionOperation Method:1. First adjust the strap to the appropriate length2. The charging port of the host is facing upward when wearing (very important)3. Straighten your back after wearing, raise your head and chest,then click the switch,the orthosis vibrates and works normalsy4. Maintain correct posture until the orthosis shakes5. When you appear that the hunchback are exceeds 25degrees,the orthosis will automaticly induce vibration to remind you of bad posture6. The brace reminds you to lift your chest and raise your head by vibrating