This is an expansion media module for the GoPro HERO9 and 10. It has a built-in high-performance shotgun microphone, a 3.5mm microphone jack for connecting an external microphone, and an HDMI output terminal for checking and playing back video. A microphone cover for wind protection is included, and there are two cold shoe mounts for attaching lights and microphones. Although it is not new, it has been used infrequently and its operation has been confirmed! We apologize, but we would like to decline any price negotiations.