Aluratek AKSUP04D 4-Port USB DVI KVM Switch for controlling up to 4 computers from one monitor, keyboard and mouse. Features DVI-I connections, USB keyboard/mouse support, audio/microphone switching and built-in USB 2.0 peripheral hub. Push-button or hotkey switching. Preowned with cosmetic wear from use/storage as shown. Includes only the KVM switch pictured, missing the proprietary cable sets and power cable - no cables included. Please verify connections and compatibility before purchase. Turns on, otherwise untested