The Model 515SBGX microphone is a low-impedance dynamic microphone designed to be mounted on a a fixed pipe. Optimized frequency response and a unidirectional (cardioid) pickup pattern makes it ideal for language labs, paging applications, and base station communications. It is also recommended for use as a talkback or cuing microphone in TV, film, and recording studios. Because of its low impedance, this microphone retains its level and response characteristics even when long lengths of cable are used.