Wall Amplifier Listening Devices Sound Amplifier

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Description:

HY929 High Strength Wall Microphone Voice Listen Detecotor for Engineer Water Leakage Oil Leaking Hearing for Repair
Works on wooden walls, doors, windows, steel , etc.
Highly Sensitive, carefully adjust audio slowly, as not to cause discomfort to your ear-buds
This audio gadget works by amplifying the vibrations of audio.
When people are talking in a room their voices are simply a waveband, and depending on how loud they are talking, the waveband travels short and long distances which are picked up and amplified by this device.
This product is being sold as an investigative tools for law enforcement or licensed investigators

Specification:

Model: HY929
Material: Metal
Colour: Black
Size: Approx.6 x 4 x 2CM/2.4 x 1.6 x 0.8 inch

Package Includes:

1 * Detecotor
1* EU Plug
1 * Circular probe
1 * probe
1 * USB Cable
1 * Headphone
1 * Use Manual

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