The KVM-404 is a KVM switch that allows access four IBM compatible computers from one PS2 Keyboard one PS2 Mouse and one VGA SVGA or Multi-sync monitor. Switching between connecting computers is as easy as pressing the push button (which is conveniently placed on the top of the switch) or entering hot-key commands from your keyboard. There is no interface card or software to install and the Tower KVM is completely independent from any operating system.Specification 4 unique loose-free cables included Supports both PS/2 keyboard and mouse Keyboard and mouse emulation for error-free PC boot up. Keyboard and mouse are hot pluggable at any time without turning either the Tower Switch or PC’s off Unique Space Saving design Auto-scan automatically selects computers sequentially Supports Microsoft IntelliMouse (Pro) Explorer Optical Hot-key and push button allow easy computer access Keyboard states automatically saved and restored when switching computers Operating system independent transparent to all applications High VGA resolution 1920 x 1440 Power-free operation - the Tower KVM draws power from