Posture Corrector Shoulder-opening Invisible Hunchback Prevention Size:SorM * Lightweight design

* Lightweight design

Battery: 4 AAA batteries (not included)

Video Format: JPG

USB charging cable * 1

Battery capacity: 380mah

Posture Corrector Shoulder-opening Invisible Hunchback Prevention Size:SorM * Lightweight designProduct information: Applicable Sports: Posture Correction Shaping Fitness Size: S M, L XL Protected Area: Shoulder Category: Shoulder Brace Note: 1. Asian sizes are 1 to 2 sizes smaller than European and American people. Choose the larger size if your size between two sizes. Please allow 2 3cm differences due to manual measurement. 2. Please check the size chart carefully before you buy the item, if you don't know how to choose size, please contact