The B043-DUA8-SL NetController 8-Port, 1U rack-mount DVI/USB/Audio KVM Switch is a highly-flexible enterprise-class KVM Switch. Control up to eight directly connected computers, or expand the number of connected computers to 64 by cascading up to eight additional B043-DUA8-SL KVM switches. Switch between connected computers via push buttons or keyboard hotkey commands. Other features include: Audio Support, 2-port USB hub for peripheral sharing among switched computers and DVI Single-Link resolutions at 1920 x 1200. Mounts easily in a standard 19-inch rack/cabinet and includes all necessary mounting hardware. Compatible with all major operating systems. Constructed of heavy-duty steel housing.