Camcorder microphone series walimex pro directivity supercardioid suitable for video camera interview public speaking sensitivity 1khz 128 mvpa frequency response 38 20000 hz noise level 135 db transmission mode cable dynamic range 115 db signal noise ratio 75 db inherent noise 20 dbspl impedance 200 ohm battery supply functions low cut filter level lowering switch level reduction 10 db high pass filter 80 hz 12 db plug 3 5mm jack pow