Fitted with K-Edge GoPro Mount interface.

K-Edge Sport TT Mount for Garmin:

The K-Edge Sport TT Mount is a lightweight and highly adjustable mount for Garmin computers on aero bars.

The Sport TT’s single bolt clamp and pivoting mount design offers you multiple mounting positions based on your aero bars, hydration systems and personal preferences.

K-Edge GoPro Mount Interface:

Works with any camera that utilizes the GoPro interface, including GoPro Hero series, GoPro Session series, and Garmin VIRB*, Garmin Virb X and Shimano CM-1000.

Attributes (specs): 

Fits K-EDGE Out-Front Garmin Mounts and XL Mounts.
Locks GoPro, Shimano, VIRB style cameras underneath Garmin Computer.
Centers camera in a low out-of-site position.
Improves video clarity by removing plastic mount shake.
Made in Boise, Idaho, USA.