Stereo analog audio ground isolation Balun with IR, RS232, RS422 or RS485 Connectivity. The Calrad 95-1046-S1 Audio-IR-Data Pigtail Balun is ideal for residential, corporate A/V, schools, home theater applications and any other situation involving structured audio distribution that transmits stereo audio signals via Cat.5e/6 UTP cable. This Balun provides a low cost and versatile UTP cabling solution for any analog audio distribution system. Each audio channel transmission signal is completely isolated with transformer based circuitry from start to finish eliminating any issues with ground loops or audio 60hz hums. The balun also has a single 3.5mm IR signal path for bi-directional signal communication and also a cable pair for data-control communication that supports RS232, RS422, RS485. Easy bi-directional connectivity either balun can act as a transmitter or receiver. Use standard pre-made Cat5e, Cat6 cables or terminate your own cabling using the 568A standard start to finish or the 568B standard start to finish.