Used Shure 515bslx Microphone
Untested
A dynamic, low-impedance, cardioid microphone which 'provides excellent voice reproduction with effective rejection of feedback and background noise' the 515BSLX is 'especially suitable for use in communications, paging, and back systems'.It has a slide-switch 'controlling the microphone audio and a relay circuit', permitting hands-free operation. It has a 1.8m, four-core, (two cores shielded), cable, and is is wired with the microphone circuit normally-open for use in 'parallel-wired microphone installations'.