Aten Rackmount KVM Switch 8 Port VGA PS/2-USB, 1x Custom KVM Cable Included, Selection Via Front & USD Menu, Broadcast ModeOne USB PS 2 console controls 8 computers Cascade up to 2 levels* control up to 64 computers Dual Interface supports computers with PS 2 or USB keyboards and mice Multiplatform support Windows 2000 XP Vista, Linux, Mac, and Sun Video DynaSync Exclusive ATEN technology eliminates boot up display problems and optimizes resolution when switching between ports Supports USB keyboards for PC, Mac and Sun Auto PS 2 and USB interface detection USB or PS 2