Tripp Lite 4-Port KVM Switch with 2 Port USB 2.0 Hub, Audio, Cable Kit, OSD and Peripheral Sharing, USB or PS/2 (B006-VUA4-K-R) Control up to 4 USB or PS/2 computers from a single monitor, keyboard and mouse Package includes 4 USB + Audio KVM cable kits Includes a built-in 2-Port USB 2.0 hub for sharing of devices amongst computers connected with a USB KVM cable kit Compatible with all major operating systems 3-year limited warranty Control up to 4 computers from a single monitor, keyboard and mouse Package includes (x2) 4 ft. and (x2) 6 ft. USB + Audio KVM cable kits (for longer length cables, choose Tripp Lite's P756-010 or P757-010) Built-in 2-Port USB 2.0 hub allows USB peripherals to be shared amongst computers connected via USB KVM cable kits Constructed of heavy-duty steel housing Compatible with all major operating systems 1 Year Limited Warranty