Standard rack mounting 19" U, the four-channel audio transmission box has two independent sets of four XLR sockets and each of RJ45 network connectors with two parallel connections. Four channels of analog audio signals or AES/EBU digital audio signals can be transmitted within 100m using one cable (note that the cable must be a shielded cable to pass through the phantom power supply). In addition to transmitting audio signals, light signals can also be transmitted. The Cat5 Ethernet cable is widely available, lightweight and affordable, saving cost and making cabling much easier.