1. Our two adapters transmit 4 analog XLR audio signals via an RJ45 network cable, connecting the sound from the mixer, microphone, and instrument to the XLR connector, and forwarding all 4 signals to the other adapter through a shielded, balanced Ethernet cable. (RJ45 cable not included) 2. It utilizes unique symmetrical characteristic impedance conversion transmission and analog audio spread spectrum isolation technology, providing anti interference capabilities. It effectively resolves device distortion and audio noise caused by long audio transmission lines or ground potential difference loop currents, eliminating audio background noise and other issues. 3. It is ideal for sending stage lighting or audio signals to a remote mixer or lighting console. At the same time, it reduces costs and avoids tangled cables. 4. Our versatile expander is compatible with other 3 pin XLR systems, microphones, or line level devices. Enjoy balanced digital/analog transmission and clear, crisp, quality sound without residual noise in various indoor and outdoor environments.