The CA-HF550 is compatible with both the new CUHD550 and existing Hitachi CCU models. See chart below. The CA-HF550 transmits video, audio, power and control over SMPTE 304M fiber between the camera and CCU. Two HD-SDI connections on the CA-HF550 provide video output at the camera end and can be switched between camera, prompter and return video. The CAHF550 also provides ample AC power at the camera head to drive both a prompter and floor monitor through the hybrid fiber cable.