Check the listing for details. CTG Audio CM-02 Electret Condenser Ceiling Microphone 215372. Condition: New. Listed at 199.00 USD. New CTG Audio CM-02 Electret Condenser Ceiling Microphone The CM-01 and CM-02 ceiling microphones utilize a special pressure sensitive, tensionless low-mass element enhanced with an integrated FET low noise amplifier. These characteristics result in ultra smooth frequency response providing excellent feedback stability for voice reinforcement and teleconferencing applications. The high temperature stability assures exceptional system performance in fixed gain situations. In an average acoustical environment this microphone will have a pickup range of 10 - 12 radius. Key Features Group teleconferencing for: Boardrooms, classrooms/training rooms, and focus groups/observation rooms Ideal for rooms with perimeter seating (no need to walk up to table to be heard).