AUD-EXT series is a family of low-cost audio extenders designed for transporting analog and digital audio signals over several hundred feet using inexpensive CAT5 (or better) UTP cable. Four different AUD-EXT models are available, each consists of one transmitter and one receiver. Audio extenders are ideal for use with a Sonnex® multiroom audio system to provide one or more audio return channels. An audio return channel allows an audio source located in any room of the house to be routed to any other room through the central audio distribution system.