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  •         speaker:Φ30mm
    　　impedance:32Ω  ±15% 
    　　Frequency Response: 20Hz-20 kHz 
    　　Cable Length:1.5 M 
    　　rated power:25mw
    　　max input power:50mw
    　　plug type:Φ3.5mm
    　　mic dimension:Φ6.0*5.0mm
    　　directivity:noise canceling
    　　sensitivity:-55db±2db

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