The audio and video balun system transmits stereo audio and composite video up to 1000ft using Cat-5e or Cat-6 cable. The advantages of the system are: clear video signal, fewer cables to manage, lower cost per connection, centralized wiring for greater control. Two units required for transmission and reception of balanced signals. 3 x RCA female jacks to RJ45 female jack. Use Calrad 75- adapter for CCTV use. Non-directional signal use.