Send two channels of lossless audio-over-ethernet while receiving two channels on the same shielded Category 5e or better cable with SoundTools CAT Tails Send-Receive units. Each unit has two female XLR and two male XLR breakouts clearly etched with large numbers to keep track of channels. SoundTools CAT Tails Send-Receive units are housed in rugged aluminum casing and use genuine Neutrik etherCON RJ45 connectors and quality Mogami 24" AES3 grade cables.