The C 33EW/SR-RF is a semi rigid cardioid gooseneck microphone with 380mm long and an open ended base mounting, with an integral PPA in low reflective ivory. The Slimline series cardioid gooseneck microphone designed for superior quality voice reproduction required in venues such as boardrooms,conferencing,court rooms and other such venues. The fast and easily detachable design makes this an ideal candidate for security and future upgrading. The Electret condenser gooseneck microphone has a cardioid polar pattern and slimline profile design. The microphone is constructed from high quality brass construction using an 8mm flexible shaft. The microphone is fitted with a phantom power adaptor accepting 9 to 48 volts DC and has an impedance of 200 Ohms. The phantom power adaptor also includes filters which will eliminate all GSM frequencies from 800-1200 MHz.