Three-way Adjustment Base Elastic Chest Strap Mount For GoPro Hero 3 Plus 4 Xiaomi Yi SJ4000 SJ5000 SJcam
Features:

Adjustment Camera Mount Adapter for Gopro Hero 4 3 3+ 2 1 Xiaomi Yi SJ4000 SJ5000 SJcam
These mount are perfect for attaching your GoPro to a Chest Harness， Helmet mount or Adhesive mount
Made of high quality material， durable and light weight
Easy operation and adjustable design for better using
Feature: Adjustable
Color: Black

Package Included:

1 x Three-way Adjustable Arm Base

Detail Pictures: