Smart backpack strap

• It helps you maintain a correct posture while sitting
• Relieves back pain and neck pain
• When your back bends more than 25 degrees, the smart back supports will sense and activate a vibration alarm immediately to correct the situation.
• It is recommended to wear it for two hours a day, and after 21 days you will notice the difference
• Easy to wear under clothes
• Suitable for many sizes because it has an adjustable strap
• Suitable for adults and helps children grow healthier without back pain
• Battery capacity: -500 mAh / 3.7V
• Charging interface: Standard USB V8 interface
• Power consumption: -0.4 watts
• Charging voltage:- 5V
• Charging time: approximately 2 hours
• Colour: grey.
• Material:- ABS + Hgh flexible nylon belt
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