. StarTech.com 4 Port Dual DVI USB KVM Switch with Audio and; USB 2.0 Hub . The SV431DD2DUA 4-port Dual DVI USB KVM Switch allows up to four PCs each with dual DVI video outputs to share two monitors one microphone and set of speakers one keyboard and one mouse as well as two other USB peripherals.An ideal solution for graphic designers CAD/CAM designers or educational and financial institutions the dual view KVM Switch allows you to instantly switch back and forth between dual DVI display PCs at the touch of a button while maintaining professional level video quality on both monitors. The dual DVI switch also features an integrated USB hub port that allows USB 2.0 peripherals such as thumb drives external hard drives or web cams to be shared between attached systems - eliminating duplicate peripheral costs.Please Note While both DVI-I (analog mode) and DVI-D (digital only) are supported by the KVM both 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 3 year warranty and free lifetime technical supportThe StarTech.com Advantage Integrated USB 2.0 hub and Mic/Audio ports allow the user to have full multimedia control of two computers and share USB peripherals eliminating the expense of duplicate devicesTake full advantage of Dual head video cards by switching up to four machines across two high resolution DVI monitorsAbsolutely no software or drivers required providing a completely OS independent KVM solution .