PC extender allows to synchronize more than two computers. Gives you flexibility to control any number of computers from a PerfectCue or PerfectCue Mini over virtually any distance via Cat5 cable. PC-Extender contains 4 USB drivers. Multiple RJ45 jacks allow "daisy-chain" or "T" connections. Many practical applications including facilitating smooth transfer from one presentation to another when multiple computers are involved. If only 4 computers need to be controlled (without remote - transmitter), onboard buttons provide "Next", "Back" and "Blank" controls. Each USB port on the PC-Extender may be quickly engaged or disengaged to allow computers to be synched.