Share a keyboard, mouse and dual DVI displays/monitors between four multimedia computers. The SV431DVIDDU 4 Port Dual DVI USB KVM Switch with Audio allows four PCs, each with dual DVI outputs, to share two monitors, a microphone and set of speakers, a keyboard and mouse as well as two other USB peripherals.An ideal solution for graphic and CAD/CAM designers, education and financial institutions, the Dual DVI KVM Switch allows you to instantly switch back and forth between PCs at the touch of a button while maintaining professional level video quality on both DVI monitors. An integrated USB hub allows USB 2.0 peripherals (external hard drives, web cams, etc.) to be shared - eliminating duplicate peripheral costs, and the hassle of connecting and disconnecting devices to multiple machines.Please Note: While both DVI-I (analog mode) and DVI-D (digital only) are supported by the KVM, all source PCs should output the same signal type for proper switching. It is recommended wherever possible to use DVI-D cables across all PC to KVM and KVM to Console connections. Please contact technical support if you require assistance identifying your source.Backed by a StarTech.com 2-year warranty and free lifetime technical support.