The Bluefish444 Epoch | 4K Neutron with Dedicated Reference Connector features three bidirectional 3G/HD/SD-SDI connectors supporting up to DCI/UHD 4K/30 resolution video input and output with extremely low latency of sub on field or frame. The card has an HDMI monitoring output and a reference BNC connector. Additionally, one of the three main SDI connectors can be set up as a reference input instead of a video signal input/output.