HKM01-4K is a 4K HDMI KVM extender that use a cost-effective Ethernet cable to send HDMI, USB, Analog audio, RS232, and IR signals with transmission distance up to 140 meters. Its TX unit has an HDMI loop out port for an extra HDMI display. The built-in 4 USB2.0 ports at RX unit allow you to control the connected HDMI device at remote end. The KVM extender can perfectly apply to the broadcasting system, digital signage, home network integration, industrial control...etc.