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Product description the product can be used through buildings such as walls, roofs, floors to listen to sound, such as in places where hostages are held, the stereo sound partition wall listening device can be used as a quick listening device for special forces, as well as military and police forces, criminal investigation, essential products of investigation and counter-investigation of Technical Investigation Department. DIMENSIONS: 105 × 26 × 128mm noise reduction: 0-10db audio input: 2 audio inputs (Mike)(SMA) audio output: 3.5”Jack (Stereo) audio control: low pass filter, periodic frequency, low cut filter 50-300hz, high cut filter 1-6hz receive control: 0-60db infinite, headset output: > 32 ohms, battery: internal 9vplus 6-12V

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