Audix M40 Miniature Condenser Ceiling Microphone | Model: M40W12SThe M40 is a miniaturized condenser microphone with a fully integrated preamp designed with very high sensitivity for distance miking. The primary applications for the ceiling mounted M40 include Video & Teleconferencing (VTC), distance learning, hospital rooms, surveillance, and ambient room miking. The M40 ceiling microphone has complete immunity from RF interference caused by cell phones and GSM devices. The M40, which comes with a cardioid