The Kramer VP-311DVI High Performance Automatic DVI/Audio Switcher is a reliable single-input DVI and stereo audio switcher that automatically selects between two connected sources. Designed for boardrooms, presentation systems, and home theater installations, the unit detects the active input source and seamlessly switches the display to that source. If the active source is disconnected, it defaults to the other available input. The switcher handles DVI signals (up to UXGA resolution) and corresponding unbalanced stereo audio signals, maintaining signal integrity over standard DVI cables. It simplifies operation by removing the need for manual selection, making it an effective, "set-it-and-forget-it" solution for multi-source environments.