Tripp Lite's 4-port KVM Switch Kit is the optimal solution for controlling 4 computers from one keyboard, mouse and monitor. Switch between computers simply by entering an easy hot key combination on the keyboard or by pushing the selector switch on the unit itself. The compact desktop design allows you to put the switch within easy view so that you can see the status LEDs. Installation is a snap - just connect the PCs to the switch using the cables provided. No software or complicated set-up procedures are required. This PS/2 switch can be used to control a USB, Sun or Mac computer when adding the appropriate adapter. Rugged metal design.