The VM8604 4-Port DVI Output Board is offers an easy way to route any of 4 audio/video sources to any of 4 displays, when used in combination with ATEN’s Modular Matrix Switch. Superior video quality – up to 1920 x 1200 @ 60Hz. Built-in scaler on each output port to support the scaling function for different video resolutions. Seamless Switch™– provides continuous video streams, real-time switching and stable signal transmission. Audio-enabled.