4-input, 8-output balanced audio transmission: Point-to-point balanced audio transmission. You can select any of the four ports (6.35/COMBO/XLR) for input and any of the other three ports (6.35/COMBO/XLR) in the group. Plug and play, no operating system restrictions. No hardware installation or debugging required. Each group features independent noise isolation and a GAN SWITCH for one-touch mute. The housing is die-cast aluminum alloy with a black water-grain finish for a stylish and elegant look. Its compact size and user-friendly design minimize installation requirements. It eliminates unwanted noise and protects equipment with built-in transient, surge suppression, and anti-static protection circuits. The 600Q-600Q design mitigates long-distance transmission losses. No TCP/IP configuration or firewall is required, eliminating security vulnerabilities. The isolated and filtered audio transmission allows for signal transmission up to 100-150 meters. It supports plug-and-play and hot-swappable operation, requires no power supply, and requires no software setup or maintenance. Color:Black Material:Aluminum Alloy Package Contents: 1 * Audio Isolator