Take maximum advantage of this existing wiring by adding baluns to each end. These small transformers convert audio and video signals from unbalanced to balanced and vice versa, making the necessary impedance adjustments for A/V signal transmission between different wiring systems. This means that you can run your signal over inexpensive cat. 5 wiring, rather than rewiring your home in order to send component video and digital audio signals from room to room. This Component Video/Digital Audio Balun is designed for use with HDTV component video and/or digital audio equipment, sending component video and digital audio transmission up to 1000 feet.