Vibrations carry interesting information. Termites or bees produce vibrations in a wall cavity, so do footsteps, voices, and machinery. Even flipping a switch or tapping on a keyboard produces detectable vibrations if you have the right equipment!This Sound Amplifier Against the Wall, when placed against a hard surface, will translate those vibrations into an electric signal which can be heard and⁄or recorded and analyzed. Listen directly with the supplied earbuds. Or connect 3.5 mm stereo output jack to your voice recorder to log the information for later review (separate cable required). Or better yet, connect to your PC (mic input) and view frequency and spectrum data with freely available software such as Audacity.Definitely sensitive enough to eavesdrop through walls as it picks up voices with amazing clarity, and maybe to hear the tumblers drop in a high quality combination lock. Could even be used in rescue operations. Volume is adjustable. Rechargeable. Runs for about 12 hours per charge, recharges in about 3 hours. Operating Temperature: -20°to 50°C.In paranormal research, it could be a revolution in collecting EVP. Hold the Sound Amplifier to the stair steps, or flooring to listen for unseen feet. Listen at windows of abandoned buildings. Check gravestones, church walls, wooden beams, even rock formations for vibrations from the “other side”.Available in two formats:
Basic Sound Amplifier which includes everything you need to get started:
– Audio Amplifier Against the Wall
– AC charger (110-220V, 50⁄60Hz)
– USB cable for charging from your computer
– Stereo earbuds
As simple and powerful as possible from a handheld listening device, this audio gadget can let you hear conversations through walls and other barriers.
So how does it work simple, you switch on the Inspector Gadget Audio Listening Device, insert the earphones, and then place the audio bug on the wall and listen to what's being said.
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.
The sensor on this audio gadget senses the vibrations hitting the walls, ceiling and floor and amplifies them so that you can listen to whats being said. If the waveband is low, meaning people talking in a lower note, then you can use the dial located at the back of this cool audio gadget to adjust the volume and increase the sensors amplification. It really makes more fun and productive.
Lets face it, no one really tells the truth straight to your face. So why not find out the truth, you will be amazed what people might say when your whether you are in a motel room, hotel room, your apartment or just in the next room the device will let know whats being said.
Specification:Primary Function: Audio Listening Device
Materials: Molded Plastic with Internal Sound Amplifier
Color: Silver /black
Onboard Buttons/Slots:
> 3.5mm Earphone Jack
> USB IN
> Sensor
> ON/OFF Switch Button with volume Dial
Power: Built In Rechargeable Battery
Dimensions: L:43 x Diameter:36 (mm)

Specification:
Colour: black
Material: metal + plastic
Size: diameter is 36mmX length is 59mm
Battery: built-in
Charging voltage: DC5V
Charging interface: micro USB interface
Charging time: about 2 hours
Sound magnification: 2-3 times
Packing size: 78 x 58 x 40mm
Packing List:
1 x headphone amplifier
1 x charging cable
1 x headset