Baluns allow you to run a video coax type signal through twisted pair wire. Two
would actually be needed to make a connection, one at each end of the twisted
pair wire.Please note: These won't work with CATV signals or to
carry CH3 or CH4 from a modulator, composite video has a much lower bandwidth
and can be carried through these but the carrier frequencies of CATV or
modulated video are too high.