Gefen Audio Extender (EXT-AUD-1000) Extends any unbalanced analogue audio device up to 1000 feet (300 meters) from the source One CAT-5e cable used for extension Bidirectional transmission for speaker and mic Extends any unbalanced analog audio device up to 1000 feet (300 meters) from the source One CAT-5e cable used for extension Bidirectional transmission for speaker and mic