StarTech.com 4 Port USB KVM Switch & USB 2.0 Hub

Share keyboard, mouse, speakers and a VGA display between four multimedia computers. This Rack Mountable USB KVM Switch supports high resolution video applications (up to 1920x1440 pixels supported) and audio switching between connected computers, and provides an integrated USB 2.0 hub that lets the selected computer have access shared high speed USB peripherals.
Providing control of up to four computers from a single USB keyboard and mouse peripheral set, the switch features a sturdy all metal chassis and can be rackmounted in a server rack/cabinet using an optional Rackmount Bracket kit (SV431RACK) - minimizing clutter and saving space.