***** 3.5mm Stereo to RJ45 female Extender Over Cat5/6 *****Set of 2 audio baluns - 1 receiver and 1 transmitter *****Easy Installation - Plug and play;These are lifesavers in getting your new PA system up and running. *****Use to connect stereo amplifiers, speakers, etc *****Bi-directional so each end can either transmit or receive Maximum of 240 ft cable length