Sennheiser e825S Handheld Cardioid Dynamic MicrophoneIts dynamic element requires no power source and delivers a frequency response of 80 Hz to 15 kHz with a gentle boost centered at 5 kHz. The cardioid polar pattern excels at rejecting sound at its off axis points, yielding enhanced immunity to feedback. The internal damping yields low handling noise, while the durable, metal construction delivers tour worthy toughness. A silent on off switch is provided for convenient muting of the mic between