The C 33ES-RF is a gooseneck cardioid microphone fitted with silent operation reed switch and micro LED indicator, 400mm long in satin black. It is designed for use in conference halls, places of worship, broadcasting and paging systems. The Electret condenser gooseneck microphone has a cardioid polar pattern and is a slimline low profile design. The microphone is constructed from high quality brass construction using either an 8 or 8.5mm flexible or semi-rigid 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 and is terminated with a male 3 pin XLR.