Controls 4 computers from a single console Keyboard/Mouse over PS/2 and/or USB connections Supports Windows; Linux; Mac OS9/OSX; Sun Micro Solaris 8 For Sun Micro users; the external power adaptor is necessary when using the KVM Switch . Emulates a keyboard on each PC to allow your computers to boot normally without a keyboard error. Supports hotswap. All devices connected to the KVM can be added or removed at any time; without shutting the unit down. Supports 2 types of switching: 1 Hardware Push Button; 2 HotKeys on PS/2 and/or USB of keyboard. Supports AutoScan function to alternate video between both computers in preset intervals. Easy switching via Hot Keys or logically designed port selectors Supports LED display for Selected and OnLine status monitoring. Supports VGA resolutions up to 2048 x 1536 maximum. Supports Beeper during Switching enabled. Self powered through PS/2 and/or USB connection the optional power adapter is not included; and we do not stock it Fully compliant with the USB 1.1/ 2.0 specification. Support Files: User s Manual Oct 12; 2007