TRENDnet 4-Port USB/PS2 KVM Switch and Cable Kit with Audio, TK-423K
The 4-Port USB PS/2 KVM Switch Kit with Audio (TK-423K) provides control of 4 computers/servers with just one set of console controls.     Manage 4 computers that have open VGA and PS/2 ports at the touch of a button with one set of PS/2 or USB keyboard and mouse, VGA monitor, microphone and speakers.    No need for additional cabling, all required cables are included. Independent audio/mic and PC port selection provide additional flexibility. LED indicators show connection status and a buzzing sound confirms port switching. With Hot-Plug, Auto-Scan and Hot-Key operating features, this versatile device is the perfect choice for managing 4 computers/servers.