The SV431TDVIUA 4-Port Triple Monitor DVI USB KVM Switch allows 4 PCs (each with 3 DVI video outputs) to share monitors, 1 microphone and set of speakers, 1 keyboard and 1 mouse, as well as an additional USB 2.0 peripheral such as an external hard drive, thumb drive, printer, or webcam. The Triple DVI KVM switch enables you to switch back and forth between 4 multi DVI PCs at the touch of a button, while maintaining professional-level video quality on all monitors at resolutions up to 1920x1200. The triple DVI KVM switch also features an integrated USB hub port which allows USB 2.0 peripherals to be shared between attached systems, eliminating duplicate peripheral costs and offering the convenience of sharing stored data between PCs. The SV431TDVIUA 4-Port Triple Monitor DVI KVM Switch is backed by a StarTech.com 3-year warranty and free lifetime technical support. PLEASE NOTE: While both DVI-I (analog mode) and DVI-D (digital only) are supported by the KVM, both source PCs must 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. If necessary, please contact our technical support team for assistance identifying your source. By enabling control of four triple display computer systems using a single set of peripherals, the switch helps saves cost and work space. With support for high definition resolutions (1920x1200) on each of the 3 connected monitors, the triple head KVM switch offers maximum screen real estate for optimized productivity. Integrated USB 2.0 hub and mic/audio switching enables you to have full multimedia control of two computers, while sharing USB peripherals. Switch three displays, mouse, keyboard, speakers, microphone, and one USB peripheral between four PCs. Graphic design and multimedia production applications. Great for CAD/CAM operators using multiple monitor systems. Financial/banking and trading workstations with multiple monitors. High resolution medical imaging with multiple displays.