I am using this on a Runcam 3, allows connection to the vtx, plus you can remotely operate the camera to stop/start recording, plus take photos. Only found one problem - If using the Runcam 3 with a Quanam 3 axis gimbal you will not be able to plug the cable into the camera because the usb socket is covered by the camera mount on the gimbal. I got around by making up an ultra low profile 90 degree usb lead. Another option would be to mount the camera upside down in the gimbal and flip the image back up the right way from the osd menu. But doing that will then block access to the sd card slot.