The DIGITUS 4-Port KVM switch for unique displays allows you to operate four 4K compatible computers using a single USB keyboard and mouse. With the press of a button or a hotkey, you can easily switch between computers without the need to reconnect all the cables. Output to a single display is provided via the HDMI output on the back. You can also swap audio signals for the microphone and speaker. Additionally, there is a USB port on the front for use with other peripheral devices such as USB sticks or external hard drives across all computers. Connected peripheral devices are reassigned to each active computer. LED indicators on the front of the switch show you the current configuration at any time. The switch also has additional advantages from a durable metal casing.