This KVM Switch allows you to manage 4 computers that have open VGA and PS/2 ports at the touch of a button. There is no need for additional cabling, all required cables are included. The independent audio/mic and PC port selection provide additional flexibility. There are LED indicators that show connection status and a buzzing sound that confirms port switching. With Hot-Plug, Auto-Scan and Hot-Key operating features, this versatile device is the perfect choice for managing 4 computers or servers.