Camcorder microphone series azden smx transducer type electret condenser directivity omnidirectional suitable for video camera interview public speaking sensitivity 1khz 10 mvpa frequency response 100 20000 hz recording angle 360 operating time 1 000 h dimensions 177 mm capsule diameter 182 mm noise level 100 db transmission mode cable signal noise ratio 60 db impedance 1 500 ohm phantom power battery supply function low cut filter hi