GoPro's Karma Grip motorized gimbal mount was first released as part of the Karma drone kit.  Unfortunately, GoPro had to recall the Karma drone due to problems with its power supply, but now the company has made the Karma Grip available as a stand-alone product.

The Karma grip is compatible directly with the GoPro Hero 5 Black and needs an adapter for Hero 4 Black and Silver models and the Hero Session 5. The motorized gimbal is used to stabilize video while walking or during other outdoor activities, when smoother footage is required than the cameras' built-in electronic stabilization can produce. The camera can be charged and transfer data to a computer while mounted on the grip. 

The grip can be handheld or attached to GoPro’s chest harness, Seeker backpack, helmet mounts and other camera supports. It's available now for $300.