The C 004E-RF is a low profile through table boundary microphone with cardioid polar pattern in satin black. The cardioid boundary layer condenser microphones designed for a wide range of installed pro sound, conferencing or security situations. The Electret condenser microphone has a cardioid polar pattern. It is constructed from robust high quality brass with a low profile steel mesh top. The microphone is fitted with a phantom power adaptor accepting 9 to 48 volts DC . The phantom power adaptor also includes filters which will eliminate all GSM frequencies from 800-1200 MHz and is terminated with a male 3 pin XLR, Sensitivity -47dB ? 3dB @ 1Khz (0dB=1V/Pa). Also includes rubber isolators to minimize the transfer of mechanical noise from table, ceiling or panel. Finish: low reflective Satin black.