The cs84u ps2 usb kvm switch is a desktop control unit that allows users to access four computers from a single kvm console in addition cs84u comes with atens video dynasync technology which eliminates boot up display problems and optimizes resolution setup is fast and easy simply plug cables into their appropriate ports there is no software to configure no installation routines and no incompatibility problems since the cs84u intercepts keyboard input directly it will work on multip