: Beijing Heweiyongtai Sci & Tech Co., Ltd.

Beijing Heweiyongtai Sci & Tech Co., Ltd. Beijing Heweiyongtai Sci & Tech Co., Ltd. was established in the beginning of 2008. We are a hi-tech enterprise specializing in manufacturing and trading

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Prison Wall Listening Device 50hz-16khz Monitoring Frequency

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Beijing Heweiyongtai Sci & Tech Co., Ltd.

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Prison Wall Listening Device 50hz-16khz Monitoring Frequency

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Prison Wall Listening Device 50hz-16khz Monitoring Frequency

50HZ~16KHZ Monitoring frequency,Multifunctional Stereo Listening System Model: HWCW-V Description Multifunctional stereo audio system can receive and record analog sound signals (human voice, ...

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prison wall listening device

50hz wall listening device

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