The C 301ES-RF is a rigid stem cardioid microphone with a knuckle joint with an integral PPA and slide switch, terminating in a Male 3 Pin XLR and 180mm long in satin black. It is Designed for use in conference halls, places of worship, broadcasting and paging systems. 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. A magnetic reed switch is fitted to the microphone for pop/click free on/off operation.