Cardioid Dynamic w/ "on/off" Switch: CAD · Dynamic · Unidirectional CAD Audio CAD12 Cardioid Dynamic Microphone CAD-12Excellent for vocals and instruments. Wide frequency response for accurate, natural sound reproduction. Cardioid polar pattern for superior feedback rejection. Flex-Form hardened-steel grill for durable performance. Includes mic clip. All-metal housing. Specifications:Operating Principle: Moving-coil dynamic Polar Pattern: Cardioid Frequency Response: 80Hz to 13KHz Sensitivity: -56dBV (3.2mV) @ 1 Pa Impedance: 500 ohms