Vender High Strength Wall Microphone Amplifier Ear Listen for Water Oil Leakage EU al mejor precio

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 plates, 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 * Needle probe 1 * USB Cable 1 * Headphone 1 * Use Manual