Camcorder microphone series rode vm transducer type condenser directivity cardioid suitable for video camera public speaking podcast interview sensitivity 1khz 22 mvpa frequency response 100 20000 hz mono operating time 70 h features internal shock absorber integrated windshield dimensions 21 x 21 x 80 mm capsule diameter 127 mm noise level 140 db transmission mode cable inherent noise 20 dba inherent noise 94 dbspl battery supply functi