The Qt 100 control module is a sound masking generator, controller and amplifier, with one auxiliary audio input to allow for distribution of audio from a paging controller or (background) music player. The Qt 100 control module is a compact one-zone controller suitable for installations of up to 12,000 square feet (1,115 m2). The masking level can be adjusted from the unit’s front panel. Auxiliary audio level is set via the front panel. The complete Qt-100 system consumes less than 7 watts of power. The Cambridge QT-100 meets all requirements of Underwriters Laboratories, the US and Canadian National Electrical Codes, FCC Part 15, and all pertinent UK and EU codes.