infrared transmission system designed for 6-channel simultaneous interpretation free from hall lighting interference. GONSIN TC-906 IR simultaneous interpretation system is designed to offer 6-channel language distribution using the advanced infrared transmission technology. The system operates in the 2 - 6 MHz frequency band which is immune to distortion from hall lighting and free from radio frequency interference, ideally suited for use in business and government conferences, international conventions and other multilingual applications.