The camera module connects directly to the back of GY-HM890 camcorder via 68-pin interface no external cables required for full studio functionality. It transports multiple bi-directional 3G-SDI signals as well as control, audio, sync, and intercom between the camera and the FS-900 Base Station.
JVC MultiDyne Camera Back Transceiver (Neutrik Opticalcon)
HDFX 4-Hour Battery for JVC GY-HM180 Camcorder