The Shure MX391/C Microflex Boundary Microphone delivers clear, natural voice reproduction for conference rooms, altars, distance-learning facilities, stages, and other installed sound applications. Its compact, low-profile design rests discreetly on flat surfaces, while the supplied cardioid condenser capsule focuses sound pickup toward the speaker.
 
An interchangeable-cartridge system allows the microphone to accommodate compatible cardioid, supercardioid, or omnidirectional capsules for different applications. Its balanced, transformerless output improves resistance to electrical noise during longer cable runs.