The posture corrector uses compact, lightweight and ergonomic ring design, which is comfortable to wear and easy to put on and take off.With the functions of angle detection and vibration reminder, it can detect the posture in multiple directions. When you have a humpback that exceeds the setting, the corrector will automatically vibrate to remind you.Made of high-quality ABS material, it is safe and reliable.The length of the product is 12cm, the width is 7.5cm and the height is 4.2cm.It is suitable for office workers, people with bowed heads, students, sedentary, etc.Item Name: Posture Correction DeviceMaterial: ABSStyle: A: LCD Model, B: Ordinary Model (Optional)Battery Capacity: 200mAh (Included)Charging Port: USBRated Input: 5V 1ARated Power: 0.4WWorking Hours: Battery Life is About 1 Week (Wear for 4 Hours a Day)Function: Smart Reminder, Targeted Posture CorrectionApplicable People: Office Workers, Phubber, Students, SedentaryFeatures: Stretch Resistance, Smart Reminder, Correct PostureSize Details: 12cm x 7.5cm x 4.2cm/4.72" x 2.95" x 1.65" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Posture Correction Device1 x USB Cable1 x User Manual