The Kit Switch 4-ports KVM TK-400K by TRENDnet enables users to operate several computers simultaneously, and navigate between different PCS at the touch of a button. (keyboard/mouse/monitor). Eliminte the problem of cumbersome cables running through with the TK-400 K. Users can control up to 4 PCs at the same time. Also included in the TK-400K are the Hot-Plug, Auto-Scan, Audible Feedback, and Hot-Key functions.