The Axisflying FPV HD Box is a relaying system that allows the user to relay the video signal from the drone's camera to a monitor or goggles for a high-definition, low-latency FPV experience. It is designed to work with the DJI FPV Goggles to help pilots share their high-quality footage and live experience via monitors.
More details at https://www.getfpv.com/axisflying-fpv-hd-box-for-dji-fpv-goggles.html