IOGEAR"s GCL1908 is an integrated LCD console with an 8-port KVM (keyboard, video, and mouse) switch that offers secure access to 8 VGA, USB or PS/2 computers. It features a convenient rack mountable sliding / retractable 19" TFT LCD active matrix monitor and keyboard with built-in touchpad for a space-saving and streamlined integration. The GCL1908 fits into a universal 1U rack mount space. The GCL1908 supports both PS/2 and USB keyboards and mice for the connected computers, and supports USB peripheral devices for the attached computers. A single GCL1908 can control up to 8 computers, but as many as 8 additional compatible KVM switches can be cascaded to reach up to 128 computers controlled from a single keyboard, monitor and mouse console. Benefits: It increases space, productivity, and provides an energy cost saving solution It contributes to a greener environment by reducing the amount of waste generated by multiple components An easy and efficient way to organize and streamline a growing or expanding server operation Can only be cascaded with other IOGEAR KVMs: GCS1808 or GCS1716 models. Requirements - VGA, SVGA, or Multi Sync video graphics card with an HDB-15 port - PS/2 mouse and keyboard ports (6-pin mini DIN) or 1 USB port .