Audio-Technica ATUC-50IU Integration UnitThe ATUC 50IU has two RJ 45 ports, seven Euroblock connectors for audio and control options, and six Euroblock connectors for LED power and general purpose input output (GPIO). Mic input is compatible with ATUC M43H, ATUC M58H, ATUC M32L, AT8657 LED, U891RCx and other microphones. Includes mic input, speaker output, headphone output, control input (Talk On, Vol. Up, Vol. Down, Channel Select Open Closed contact), LED status output, GPIO. Designed for