This double gooseneck cardioid condenser microphone with integral power module and 58 27 adapter mount is ideal for boardroom school government house of worship and other installed applications featuring a wide range condenser element with low mass diaphragm for superior performance the microphones self contained electronics eliminate need for external power modules available in two lengths 1579 pro47tl and 1240 pro47t features wide range condenser element with low mass diap