Camcorder microphone series img stage line ecm transducer type electret condenser directivities cardioid supercardioid suitable for video camera sensitivity 1khz 15 mvpa frequency response 80 12000 hz switchable directivity dimensions 285 mm capsule diameter 25 mm transmission mode cable signal noise ratio 40 db impedance 1 000 ohm phantom power battery supply plug xlr weight 460 g