One USB-PS/2 console controls up to 8 computers; Daisy-chain up to 31 additional units - control up to 256 computers from a single console Front accessible USB port allows each computer to access USB peripherals *; Dual Interface - supports computers and console with PS/2 or USB keyboards and mice; Multiplatform support - Windows, Linux, Mac and Sun; Video DynaSync™ - stores the console monitor's EDID (Extended Display Identification Data) to optimize display resolution; Supports USB keyboards for PC, Mac and Sun; Auto PS/2 and USB interface detection; USB / PS/2 keyboard and mouse emulation - computers boot even when the console focus is elsewhere; Superior video quality - up to 2048 x 1536 -- DDC2B; No software required - convenient computer selection via front panel pushbuttons, hotkeys and multilingual on-screen display (OSD) menus; Auto-senses station's position on daisy-chained installations; no need for manual dip switch setting; front panel led indicates station's position; Port names automatically reconfigured when station sequence is changed; Two level password security; only authorized users view and control computers; up to four users and an administrator with separate profiles for each; Auto Scan feature for monitoring user-selected computers; Broadcast Mode - operation simultaneously performed on all selected computers... etc; Hot pluggable - add or remove computers without having to power down the switch; Buzzer on/off via hotkey and OSD; Firmware upgrades to all the chained KVM switch at the same time via the daisy-chain cable; Rack mountable in 19" system rack (1U) * The USB peripheral function only works with USB cable set connections. It will not work with PS/2 cable set connections.