4K Ultra HD 600 MHz 1:4 HDMI Splitter w/ HDR. Designing systems capable of distributing 4K Ultra High Definition media requires support for the content of today, and headroom for the content of tomorrow. The Gefen EXT-UHD600-14 splitter distributes signal from one 4K source, and distributes it to up to four 4K displays or video zones. The splitter features a 1U tall, rack-mountable enclosure that can also be placed on a shelf. It also accommodates Gefen locking HDMI cables for secure connections. Specifically designed to support multiple layers of splitting/cascading in large video distribution and signage applications, supporting up to hundreds of displays