The XTENDEX® 4K 18Gbps HDMI USB KVM Extender over HDBase-T with RS232 transmits uncompressed digital Ultra-HD 4Kx2K 60Hz 4:4:4 HDMI signal, USB, IR, RS232, and power up to 328 feet over a single CATx cable using HDBase-T technology. Each extender consists of a local unit that connects to a computer and provides local keyboard, monitor and mouse connections; and a remote unit that connects to a keyboard, monitor and mouse.