3-Pin Microphone With LED Ring (580mm) https://www.audio-technica.com/nl-nl/commercial-audio/more/discussion-systems/components/atuc-m58h
ATUC-M58H 3-Pin Microphone with LED Ring (580mm). – Compatible with ATUC-50 Digital Discussion System it – has a unique 3-pin balanced microphone with remote
LED Ring (580mm) 3-Pin Microphone With LED Ring