IOGEAR 16-Port USB PS/2 Combo KVM Switch with USB KVM Cables, GCS1716KITU Cascade Up to 2 Levels - Control Up to 256 Computers From A Single Console Maximum Video Resolution: Up to 2048 x 1536 Easy to Operate - Computer Selection Via Front Panel LED?s, Intuitive OSD (On Screen Display), and Hotkeys Cascade Up to 2 Levels - Control Up to 256 Computers From A Single Console Maximum Video Resolution: Up to 2048 x 1536 Easy to Operate - Computer Selection Via Front Panel LEDs, Intuitive OSD (On Screen Display), and Hotkeys