the C 420E is a twin mount back electret condenser microphone and Each microphone has individually adjustable angled solid shafts, Inline phantom power adaptor contains a switchable 10 dB pad and bass cut filter, 309mm long in satin black. Designed for us in places of worship, conferencing, broadcasting and other places requiring twin microphone for backup / fail safe operation. Twin mount back electret condenser microphone with a cardioid polar pattern. Constructed from high quality brass each microphone is fixed to solid shafts which can be individually adjusted 180 degrees for correct vertical angle. Phantom power required 9 – 48 Volts dc. The inline phantom power adaptor contains a switchable 10 dB pad and bass cut filter(-4dB per octave at 400 Hz to –6dB per octave at 100 Hz).