The T3-MJ+ is a simple installation requiring a 2-inch round hole. Less than 1.5-inches of under table clearance is required. The built-in, acoustically isolated microphone connector accommodates microphones with 3-pin XLR plugs of a diameter of 1-inch or less and provides superior shock and vibration damping. They are designed to accommodate a wide range of tables and lecterns with up to 21?8-inch thick surfaces. An undertable shroud is provided as part of the assembly.