Dual xlr(mb-dxlb) audio balun allows dual channels professional audio to be transmitted via cat5e/6 cable, up to 4, 200ft(1250m) in a point-to-point connection.It is built in surge suppressor to protect professional audio equipment against damaging voltage spikes.Its integrated ground loop isolation prevents annoying "hum-bars" common noise with long distance installations.The product is designed for audio applications where full-range, hi-fidelity audio frequency response is required.Used in pairs, the prpfessional audio balun(mb-dxlr) eliminates costly and bulky coaxial cable, allowing audio equipment to be connected or moved within a structured cabling environment.