One KVM console control up to 8 directly connected computers. By daisy chaining up to 31 additional KH1508A switches, as many as 256 computers can be controlled from the original KVM console. Superior Video Quality- Supports the video resolutions up to 1920 x 1200 @60Hz for up to 30 meters*, 1600 x 1200 @60Hz for up to 40 meters, and 1280 x 1024 @75Hz for up to 50 meters. Three port selection methods: Manual (via front panel pushbuttons), Hotkey, and multi-language OSD (On Screen Display)