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BK-390???黰?
???????/The power supply??.......................Transmitter DC9V receiver AC220V 50Hz 
????????/Microphone power??...........................................25mA
??????/Carrier Frequency??........................................VHF200~270MHz
????????/Frequency Stability??.....................................................................+0.002%
?????/Slgnll noise Ratio??....................................................>98dB
????????/Resembles Inferference??...........................................>80dB
?????Χ/Dynamic Range??......................................................>90dB
г?????/Harmonic distortion??................................................<0.5%
????/Type: .................................................................?????/Condenser
??????/Polar Pattern: ........................................????????/Unidrectional
??????/Frequency Response??...........................................................60Hz~16000Hz
?????????/Microphone Sensitivity??..................................................-47??3dB@1KHz
??????????/Receiver Sensitivity??...................................................50uS(SINAD=20dB)
??????/audio frequency output:........... Independence is 0-??400mv Mix 0-??300mv
????Χ/Temperature Range??........................................................-10??~55??


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