... response: 30Hz-18KHz Sensitivity: -40dB Uni-direction Electret Condenser Microphone for Recording Studio Specifications:Frequency response: 30Hz-18KHzSensitivity: -40dB± ... to strong radio clear2. used CR1632 lithium battery for over working hours,LED low voltage indication3. no ... equipmentCompatible for:Canon 5D Mark II, Canon 7D, 550D, Panasonic Lumix GH1, and other household DV with microphone input ...