. The SV431DVIUAHR 4 Port High Resolution USB (Universal Serial Bus) DVI Dual Link KVM Switch with Audio provides simple yet comprehensive KVM control of up to 4 directly connected computers with dual link DVI output & USB (Universal Serial Bus) keyboard & mouse connections. Audio switching capability & support for high resolution dual link DVI applications up to 2560x 1600 @ 60 Hz (up to 3840x 2400 at lower refresh rates) make this KVM a superior switching solution that integrates perfectly into multimedia environments. The DVI USB (Universal Serial Bus) KVM Switch is compatible with all USB (Universal Serial Bus) supported operating systems with no software or drivers to install & features a built-in USB (Universal Serial Bus) 2.0 hub that means that you can share up to 3 high speed USB (Universal Serial Bus) devices between computers. Backed by a Star Tech.com 3-year warranty & free lifetime technical support. The Star Tech.com Advantage. . Dual Link DVI interface supports higher resolution applications allowing you to take full advantage of your larger high resolution monitors workspace Integrated USB (Universal Serial Bus) 2.0 hub allows the user to have full multimedia control & share USB (Universal Serial Bus) peripherals eliminating the expense of duplicate devices Supports even higher resolutions (exceeding 2560x 1600) by using a lower refresh rate. Example 3840x 2400 @30 Hz..