Black Box ServSwitch DT DVI 4-Port with Transparent USB 2.0 KitBlack Box ServSwitch DT DVI 4 Port with Transparent USB 2. 0 Kit The Black Box ServSwitch DT DVI 4 Port with Transparent USB 2. 0 Kit is the ultimate solution for professionals who need to manage multiple computers from a single, reliable console. Designed for demanding environments such as data centers, software development labs, design studios, and control rooms, this four port KVM switch delivers crisp DVI video, seamless USB 2. 0 peripheral