The Catapult is a passive audio distribution system that allows you to send four channels of analog audio over standard Cat 5/6 cable. This package contains a 4-channel Catapult TX4 transmitter and a 4-channel Catapult RX4 receiver with a 25' etherCON cable. Each transmitter and receiver also has EtherCON and XLR pass-throughs which greatly expand your options for audio distribution.