Tripp Lites B043-DUA8-SL, NetController 8-Port, 1U rackmount DVI / USB / Audio KVM Switch is an affordable, highly-flexible enterprise class KVM Switch. Control up to 8 directly connected computers, or expand the number of connected computers to up to 64, by cascading up to 8 additional B043-DUA8-SL KVM switches. Switch between connected computers via pushbuttons or keyboard hot-key commands. Other features include: Audio Support, 2-Port USB Hub for peripheral sharing among switched computers, and DVI Single Link resolution at 1920x1200. Mounts easily in a standard 19" rack/cabinet and includes all necessary mounting hardware. Compatible with all major operating systems. Constructed of heavy-duty steel housing.