StarTech.com 2- and 4-port USB DVI KVM Switches with USB Hubs and Audio Support - StarTech.com SV431DVIUAGB, This StartTech.com 4-port DVI USB KVM switch lets you control 4 x USB enabled computers with DVI video output from a single USB keyboard and mouse peripheral set. Ideal for multimedia applications, the switch supports audio and microphone switching, either independently or simultaneously when switching between computers.The switch features an integrated 4-port USB 2.0 hub which allows you to access USB peripherals from each of the slave computers. An economical solution that lets you share USB peripherals between computers (when selected) without the expense of buying individual peripherals for each computer. StarTech.com SV431DVIUAGB 4 Port USB DVI KVM Switch With Audio & USB Hub