Rode Stereo VideoMic On-Camera Microphone Designed for the Hero5/6/7 Black

Designed for the Hero5/6/7 Black edition camera

but it is not an original accessory

The RAM-B-108BU consists of a 1" diameter rubber ball connected at a right angle to a v-shaped base

it efectively reduces unwanted noise when the subject sound is very loud and close to the microphone

Rode Stereo VideoMic On-Camera Microphone Designed for the Hero5/6/7 BlackThe Stereo VideoMic On Camera Microphone from Rode is a high quality microphone designed for use with camcorders, DSLR cameras, and portable audio recorders. It features two high resolution 1 2" condenser capsules mounted in a fixed X Y stereo array, providing a natural stereo recording, while offering a high level of rear rejection. The Stereo VideoMic can be used to capture environmental and ambient sounds, as well as live music. A built in