This is the GoPro Side Mount. The Side Mount allows you to mount your GoPro to the side of helmets, vehicles, gear and more. Plus, the 3-way adjustability makes aiming easy, so you can always get the angles you want.

Features:
Versatile side-mounting solution for helmets, vehicles and gear
Offers 3-way adjustability for a variety of shots and capture angles
Compatible with all GoPro cameras