4-port KVM Switch Kit offers a way to control four computers from one keyboard, mouse and monitor. Switch between computers by entering a hot key combination on the keyboard or by pushing the selector switch on the unit itself. Works with all operating systems and supports VGA, SVGA, or Multisync monitor - PS2, USB, and Sun compatible (with appropriate adapters). Supports Microsoft IntelliMouse and the scrolling wheel on most mice. Delivers superior video quality by supporting ultra-high 180MHz video resolutions up to 2048 x 1536. Compact desktop design allows you to put the switch within easy view for visible status LEDs. USB adapter allows connection to CPU USB port. Installation is a snap - just connect the PCs to the switch using Tripp Lites P774-cable or P776-cable sets (sold separately). No software or complicated setup procedures are required. Does not require external AC power. Control PS/2 or USB systems when using the appropriate cable kit. Made with a rugged metal design.