HDR video lets you pick up subtle highlight and shadow details. Even in high-contrast environments, 4K recording captures these nuances and soft lighting transitions. Stabilization modes can also be turned on when shooting in 4K HDR to effectively eliminate camera shake.
There is a 1/4"-20 thread on the bottom of the vertical mount that allows you to add accessories or mount it onto another rig.
And as part of the Adventure Kit, the Multifunctional Battery Case stores three Osmo 3 batteries and it can also fast charge them simultaneously. The case can be powered by an external power source via its USB Type-C port and it can also act as a power bank to power other devices via that same port. The case even stores two microSD cards to keep them safe and protected.