Loudspeaker Polarity Tester

  • RK5991N Microphone Polarity Tester

    RK5991N Microphone Polarity Tester

    RK5991N microphone polarity tester can distinguish positive and negative polarity of any type,size,material,impedance of loudspeaker headset,the moving coil receiver automatically and rapidly.

    Measuring Pulse Width:0.4ms

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