The SMPTE 311M Fiber Optic System from JVC includes the Camera Unit, the G4 Base Station for tactical fiber, OpticalCON connectors, an V-Mount PowerPlus, an HDX power supply, 10' ST to LC jumpers, and a universal intercom. The system is for use with the GY-HM890 ProHD camcorder. It provides you with all the signals used in television broadcast production from digital video transmission to intercom interface.