Heinrich's H0300ME is a versatile conference extension controller designed to enhance the capa­bilities of conference systems. It allows the connection of additional conference microphone units, increasing the system's capacity to accommodate larger gatherings. The controller utilizes a dedicated 6-pin cable to ensure reliable transmission of conference information over long dis­tances and maintain exceptional sound quality. Its robust metal housing and grounded connec­tion provide protection against static electricity, ensuring optimal performance in various envi­ronments. The compact 2U metal cabinet allows for easy installation in standard 19-inch racks, facilitating convenient placement and maintenance. The built-in international universal power supply ensures compatibility with different electrical standards, while the three-channel synchro­nous extension capability supports the connection of up to 128 conference units.