The M55 is an innovative, hanging ceiling microphone system designed for applications where aesthetics, sound quality, and ease of installation are critical. The M55 is ideally suited for board, class, and conference rooms, and can also been used for ambient room miking and surveillance.nbsp;Applications that utilize AVB transport can deploy the M55 audio signal over a single Ethernet cable. All electronics are fully integrated, high sensitivity, low noise, and the signal output is balanced, so cell phones and GSM devices do not cause RF interference. Installing the M55 requires drilling just one 5/8-inch hole in the ceiling, with no additional tools needed. The M55's mounting hardware easily adjusts the hanging height up to four feet from the ceiling surface without removing ceiling tiles. An optional aiming clip easily makes any additional angular adjustments. The cable assembly, with its Phoenix connector, is neatly housed in an airtight, plenum-rated junction box. A wire safety cable provides additional seismic restraint.