The UD-12+ KVM switch is built around ConnectPRO's patented Dynamic Device Mapping (DDM) technology. With DDM, the UD-12+ maintains the connection between your keyboard, mouse, and the computer; this allows for instant switching between computers. The UD-12+KIT includes a choice of either 6, 10, or 15 foot KVM cables, and a firmware update/serial control cable. The KVM cables combine the DVI and USB cables for the computer connection into one cable with a Y split on either end of the cable, allowing you to manage your cables easily.