1KHz 4×1.5v Aa Battery 1mw Listen Through Wall Device

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Beijing Heweiyongtai Sci & Tech Co., Ltd.

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1KHz 4×1.5v Aa Battery 1mw Listen Through Wall Device

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1KHz 4×1.5v Aa Battery 1mw Listen Through Wall Device

Listen Through Wall Device Description This two power transducers listen through wall device is the most updated one in similar products nowadays, which can give listener the clearest audio informatio...

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1mw listen through wall device

4×1.5V battery listen through wall device

1KHz listen through wall device

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