Broadened Horizons. With the DJI Ronin 4D Expansion Plate, your connection possibilities are broadened with an SDI output port, a BNC port to share timecode information to other devices, and two 3-pin XLR inputs. Both XLR inputs are equipped with switches to accommodate mic, line-level, and even +48V phantom-powered audio accessories. This unit attaches to the back of either the 6K or 8K Ronin 4D using 3 mounting screws and a proprietary connector.