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Through Wall Listening Device 4×1.5V AA Battery Power Transducers 1mW Signal

Through Wall Listening Device 4×1.5V AA Battery Power Transducers 1mW Signal

Through Wall Listening Device 4×1.5V AA Battery Power Transducers 1mW Signal

Listen Through Wall Device Specification Power of Signal: 1mW Frequency of Swing: @1KHz,6 Db (attenuation) @300Hz,15 Db Channel Attenuation Separation: >40 Db Stereo Balance Control: ±10 Db Non-linear ...

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listen through walls devices

      

listening through walls stethoscope

      
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